/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:30:14,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:30:14,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:30:14,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:30:14,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:30:14,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:30:14,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:30:14,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:30:14,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:30:14,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:30:14,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:30:14,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:30:14,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:30:14,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:30:14,634 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:30:14,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:30:14,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:30:14,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:30:14,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:30:14,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:30:14,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:30:14,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:30:14,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:30:14,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:30:14,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:30:14,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:30:14,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:14,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:30:14,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:30:14,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:30:14,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:30:14,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:30:14,638 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:30:14,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:30:14,639 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:30:14,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:30:14,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:30:14,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:30:14,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:30:14,951 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:30:14,952 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:30:14,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl [2021-06-05 14:30:14,953 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl' [2021-06-05 14:30:14,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:30:14,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:30:14,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:14,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:30:14,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:30:14,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:15,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:30:15,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:30:15,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:30:15,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... [2021-06-05 14:30:15,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:30:15,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:30:15,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:30:15,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:30:15,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:15,101 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:30:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:30:15,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:30:15,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:30:15,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:30:15,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:30:15,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:30:15,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:30:15,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:30:15,103 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:30:15,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:30:15,547 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 14:30:15,548 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:15 BoogieIcfgContainer [2021-06-05 14:30:15,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:30:15,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:30:15,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:30:15,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:30:15,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:14" (1/2) ... [2021-06-05 14:30:15,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee21bf and model type name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:30:15, skipping insertion in model container [2021-06-05 14:30:15,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:15" (2/2) ... [2021-06-05 14:30:15,555 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-symm.wvr.bpl [2021-06-05 14:30:15,560 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:30:15,561 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:30:15,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:30:15,563 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:30:15,609 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:30:15,630 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:30:15,659 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:30:15,659 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:30:15,659 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:30:15,659 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:30:15,659 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:30:15,660 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:30:15,660 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:30:15,660 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:30:15,666 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-06-05 14:30:15,677 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:30:15,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,685 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1618380568, now seen corresponding path program 1 times [2021-06-05 14:30:15,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239428584] [2021-06-05 14:30:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:15,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:15,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239428584] [2021-06-05 14:30:15,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239428584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:15,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:15,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977405558] [2021-06-05 14:30:15,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:15,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:15,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:15,969 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,098 INFO L93 Difference]: Finished difference Result 60 states and 106 transitions. [2021-06-05 14:30:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:30:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,109 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:30:16,109 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 14:30:16,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 14:30:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-06-05 14:30:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-06-05 14:30:16,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-06-05 14:30:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,147 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-06-05 14:30:16,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-06-05 14:30:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:30:16,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,149 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:30:16,150 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1005020504, now seen corresponding path program 2 times [2021-06-05 14:30:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207036613] [2021-06-05 14:30:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207036613] [2021-06-05 14:30:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207036613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:16,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293769281] [2021-06-05 14:30:16,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:16,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:16,265 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,395 INFO L93 Difference]: Finished difference Result 58 states and 105 transitions. [2021-06-05 14:30:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:30:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,397 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:30:16,397 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 14:30:16,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 14:30:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-06-05 14:30:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 14:30:16,407 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 14:30:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,407 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 14:30:16,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 14:30:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:30:16,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:30:16,409 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1566097466, now seen corresponding path program 3 times [2021-06-05 14:30:16,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784254227] [2021-06-05 14:30:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784254227] [2021-06-05 14:30:16,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784254227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:16,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:16,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623052977] [2021-06-05 14:30:16,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:16,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:16,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:16,503 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,585 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-06-05 14:30:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:30:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,602 INFO L225 Difference]: With dead ends: 67 [2021-06-05 14:30:16,602 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 14:30:16,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 14:30:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-06-05 14:30:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 14:30:16,607 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-06-05 14:30:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,608 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 14:30:16,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 14:30:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:16,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:30:16,609 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash 602481210, now seen corresponding path program 1 times [2021-06-05 14:30:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052863593] [2021-06-05 14:30:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052863593] [2021-06-05 14:30:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052863593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:16,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751626457] [2021-06-05 14:30:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:30:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751626457] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:16,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-06-05 14:30:16,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533221483] [2021-06-05 14:30:16,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:16,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:16,780 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,818 INFO L93 Difference]: Finished difference Result 59 states and 112 transitions. [2021-06-05 14:30:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,820 INFO L225 Difference]: With dead ends: 59 [2021-06-05 14:30:16,820 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:30:16,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:30:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-06-05 14:30:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 14:30:16,826 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 13 [2021-06-05 14:30:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,826 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 14:30:16,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 14:30:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:16,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,049 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1691964264, now seen corresponding path program 2 times [2021-06-05 14:30:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135970147] [2021-06-05 14:30:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135970147] [2021-06-05 14:30:17,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135970147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:17,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174080350] [2021-06-05 14:30:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:30:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174080350] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:17,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-06-05 14:30:17,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056468710] [2021-06-05 14:30:17,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:17,294 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,349 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2021-06-05 14:30:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,351 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:30:17,351 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:30:17,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:30:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2021-06-05 14:30:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-06-05 14:30:17,356 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-06-05 14:30:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,357 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-06-05 14:30:17,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-06-05 14:30:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:17,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,580 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1360970772, now seen corresponding path program 3 times [2021-06-05 14:30:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91251103] [2021-06-05 14:30:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91251103] [2021-06-05 14:30:17,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91251103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:17,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989830328] [2021-06-05 14:30:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:17,647 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,726 INFO L93 Difference]: Finished difference Result 62 states and 116 transitions. [2021-06-05 14:30:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,735 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:30:17,735 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 14:30:17,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 14:30:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2021-06-05 14:30:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 14:30:17,739 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-06-05 14:30:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,740 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 14:30:17,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 14:30:17,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:17,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:30:17,741 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2069833721, now seen corresponding path program 1 times [2021-06-05 14:30:17,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998216767] [2021-06-05 14:30:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998216767] [2021-06-05 14:30:17,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998216767] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:17,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010072486] [2021-06-05 14:30:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:17,785 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,837 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-06-05 14:30:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,839 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:30:17,839 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:30:17,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:30:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 14:30:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:30:17,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:30:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,847 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:30:17,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:30:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:17,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,848 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:30:17,848 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash -703281478, now seen corresponding path program 4 times [2021-06-05 14:30:17,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692449437] [2021-06-05 14:30:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692449437] [2021-06-05 14:30:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692449437] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65423657] [2021-06-05 14:30:17,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:17,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:17,892 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,930 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-06-05 14:30:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,931 INFO L225 Difference]: With dead ends: 63 [2021-06-05 14:30:17,931 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:30:17,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:30:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-05 14:30:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:30:17,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:30:17,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,934 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:30:17,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:30:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:17,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:30:17,935 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1830677571, now seen corresponding path program 2 times [2021-06-05 14:30:17,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362657939] [2021-06-05 14:30:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362657939] [2021-06-05 14:30:17,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362657939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681015451] [2021-06-05 14:30:17,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:17,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:17,968 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,019 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-06-05 14:30:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,022 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:30:18,022 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 14:30:18,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 14:30:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-06-05 14:30:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:30:18,030 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:30:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,031 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:30:18,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:30:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:18,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:30:18,036 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 538750782, now seen corresponding path program 5 times [2021-06-05 14:30:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742276897] [2021-06-05 14:30:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742276897] [2021-06-05 14:30:18,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742276897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816829112] [2021-06-05 14:30:18,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:18,090 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,134 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-06-05 14:30:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:18,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,135 INFO L225 Difference]: With dead ends: 65 [2021-06-05 14:30:18,135 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:30:18,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:30:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 14:30:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 14:30:18,138 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-06-05 14:30:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,138 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 14:30:18,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 14:30:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:18,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:30:18,139 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1929059923, now seen corresponding path program 3 times [2021-06-05 14:30:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662770541] [2021-06-05 14:30:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662770541] [2021-06-05 14:30:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662770541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834551828] [2021-06-05 14:30:18,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:18,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:18,165 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,201 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 14:30:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,202 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:30:18,202 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 14:30:18,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 14:30:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-06-05 14:30:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 14:30:18,205 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 14:30:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,205 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 14:30:18,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 14:30:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:30:18,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:30:18,206 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1614461938, now seen corresponding path program 6 times [2021-06-05 14:30:18,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223612405] [2021-06-05 14:30:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223612405] [2021-06-05 14:30:18,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223612405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:30:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335801440] [2021-06-05 14:30:18,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:30:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:30:18,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:30:18,232 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,254 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-06-05 14:30:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:18,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:30:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,255 INFO L225 Difference]: With dead ends: 43 [2021-06-05 14:30:18,255 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 14:30:18,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 14:30:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 14:30:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 14:30:18,257 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 14:30:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,257 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 14:30:18,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 14:30:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:18,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 14:30:18,258 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 576295941, now seen corresponding path program 1 times [2021-06-05 14:30:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464477618] [2021-06-05 14:30:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464477618] [2021-06-05 14:30:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464477618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:18,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813568169] [2021-06-05 14:30:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:30:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:18,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:18,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:18,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:18,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:18,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:18,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:18,767 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:18,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,811 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.6 percent of original size [2021-06-05 14:30:18,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:18,813 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:190, output treesize:43 [2021-06-05 14:30:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813568169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:18,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:18,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539231654] [2021-06-05 14:30:18,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:18,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:18,915 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,855 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-06-05 14:30:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,895 INFO L93 Difference]: Finished difference Result 88 states and 166 transitions. [2021-06-05 14:30:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,896 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:30:19,896 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 14:30:19,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 14:30:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-06-05 14:30:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-05 14:30:19,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-05 14:30:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,899 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-05 14:30:19,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-05 14:30:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:19,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:20,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:30:20,117 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash -9467753, now seen corresponding path program 2 times [2021-06-05 14:30:20,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:20,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784846353] [2021-06-05 14:30:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784846353] [2021-06-05 14:30:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784846353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:20,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413156982] [2021-06-05 14:30:20,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:20,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:20,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:20,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:20,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:20,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:20,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:20,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-06-05 14:30:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413156982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:20,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:20,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:20,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098221261] [2021-06-05 14:30:20,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:20,604 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:20,843 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2021-06-05 14:30:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:20,844 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:30:20,844 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 14:30:20,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 14:30:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-06-05 14:30:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-06-05 14:30:20,847 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-06-05 14:30:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:20,847 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-06-05 14:30:20,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-06-05 14:30:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:20,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:20,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:21,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:21,061 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 384988251, now seen corresponding path program 3 times [2021-06-05 14:30:21,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:21,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518488283] [2021-06-05 14:30:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518488283] [2021-06-05 14:30:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518488283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343033849] [2021-06-05 14:30:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:21,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:21,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:21,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:21,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:21,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:21,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:21,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:21,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,484 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-06-05 14:30:21,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:21,486 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:153, output treesize:58 [2021-06-05 14:30:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343033849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:21,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678002297] [2021-06-05 14:30:21,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:21,621 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:21,916 INFO L93 Difference]: Finished difference Result 73 states and 133 transitions. [2021-06-05 14:30:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:21,917 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:30:21,917 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 14:30:21,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 14:30:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-06-05 14:30:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:30:21,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-06-05 14:30:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:21,920 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:30:21,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:30:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:21,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:21,920 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:30:22,129 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 922843829, now seen corresponding path program 4 times [2021-06-05 14:30:22,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65301833] [2021-06-05 14:30:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:22,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:22,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65301833] [2021-06-05 14:30:22,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65301833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:22,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460385441] [2021-06-05 14:30:22,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:22,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:30:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:22,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:22,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:22,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:22,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:22,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:22,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,523 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-06-05 14:30:22,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:22,525 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-06-05 14:30:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460385441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:22,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:22,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393716123] [2021-06-05 14:30:22,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:22,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:22,646 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,018 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-06-05 14:30:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,019 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:30:23,019 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 14:30:23,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 14:30:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-06-05 14:30:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 96 transitions. [2021-06-05 14:30:23,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 96 transitions. Word has length 14 [2021-06-05 14:30:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,022 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 96 transitions. [2021-06-05 14:30:23,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 96 transitions. [2021-06-05 14:30:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:23,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,022 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:23,229 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1247641723, now seen corresponding path program 5 times [2021-06-05 14:30:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95994950] [2021-06-05 14:30:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95994950] [2021-06-05 14:30:23,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95994950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630076521] [2021-06-05 14:30:23,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:23,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:30:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:23,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:23,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:23,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:23,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:23,619 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:33 [2021-06-05 14:30:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630076521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:23,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:30:23,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633667466] [2021-06-05 14:30:23,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:30:23,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:30:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:23,676 INFO L87 Difference]: Start difference. First operand 49 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,954 INFO L93 Difference]: Finished difference Result 66 states and 125 transitions. [2021-06-05 14:30:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,955 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:30:23,955 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:30:23,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:30:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-06-05 14:30:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-06-05 14:30:23,958 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-06-05 14:30:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,958 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-06-05 14:30:23,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-06-05 14:30:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:23,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:24,182 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash -853185719, now seen corresponding path program 6 times [2021-06-05 14:30:24,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382002435] [2021-06-05 14:30:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382002435] [2021-06-05 14:30:24,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382002435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242641801] [2021-06-05 14:30:24,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:24,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:30:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:24,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:24,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:24,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:24,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:24,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:24,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:24,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,516 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-06-05 14:30:24,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:24,517 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-06-05 14:30:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242641801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:24,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852868543] [2021-06-05 14:30:24,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:24,624 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,961 INFO L93 Difference]: Finished difference Result 72 states and 139 transitions. [2021-06-05 14:30:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,962 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:30:24,962 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:30:24,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:30:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-06-05 14:30:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-06-05 14:30:24,964 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-06-05 14:30:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,964 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-06-05 14:30:24,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-06-05 14:30:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:24,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 14:30:25,181 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -315330141, now seen corresponding path program 7 times [2021-06-05 14:30:25,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942945992] [2021-06-05 14:30:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942945992] [2021-06-05 14:30:25,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942945992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008292184] [2021-06-05 14:30:25,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:25,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:25,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:25,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:25,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:25,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:25,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,564 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-06-05 14:30:25,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:25,565 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:145, output treesize:58 [2021-06-05 14:30:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008292184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:25,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:25,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:30:25,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164845557] [2021-06-05 14:30:25,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:25,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,695 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,112 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2021-06-05 14:30:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,113 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:30:26,113 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:30:26,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:30:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2021-06-05 14:30:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-06-05 14:30:26,116 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-06-05 14:30:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,116 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-06-05 14:30:26,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-06-05 14:30:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:30:26,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,117 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:26,321 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 272415181, now seen corresponding path program 8 times [2021-06-05 14:30:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766254648] [2021-06-05 14:30:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766254648] [2021-06-05 14:30:26,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766254648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:26,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992836420] [2021-06-05 14:30:26,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:26,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:30:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:26,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:26,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:26,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:26,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:26,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,675 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-06-05 14:30:26,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:26,676 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-06-05 14:30:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992836420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:26,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:26,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:30:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145886036] [2021-06-05 14:30:26,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:26,777 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,076 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-06-05 14:30:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:30:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,079 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:30:27,079 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:30:27,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:30:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-06-05 14:30:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2021-06-05 14:30:27,085 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 14 [2021-06-05 14:30:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,085 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2021-06-05 14:30:27,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2021-06-05 14:30:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:27,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,086 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 14:30:27,308 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash -745410905, now seen corresponding path program 9 times [2021-06-05 14:30:27,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975617794] [2021-06-05 14:30:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975617794] [2021-06-05 14:30:27,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975617794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896440180] [2021-06-05 14:30:27,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:27,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896440180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:27,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:30:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270479528] [2021-06-05 14:30:27,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:27,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:27,450 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,519 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-06-05 14:30:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,519 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:30:27,519 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:30:27,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:30:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-06-05 14:30:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-06-05 14:30:27,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-06-05 14:30:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,521 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-06-05 14:30:27,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-06-05 14:30:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:27,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,522 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 14:30:27,722 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1331174599, now seen corresponding path program 10 times [2021-06-05 14:30:27,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804534592] [2021-06-05 14:30:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804534592] [2021-06-05 14:30:27,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804534592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876002577] [2021-06-05 14:30:27,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:27,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:27,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876002577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:27,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:27,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73581004] [2021-06-05 14:30:27,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:27,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:27,895 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,020 INFO L93 Difference]: Finished difference Result 84 states and 172 transitions. [2021-06-05 14:30:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,020 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:30:28,020 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:30:28,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:30:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-06-05 14:30:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-06-05 14:30:28,023 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-06-05 14:30:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,023 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-06-05 14:30:28,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-06-05 14:30:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:28,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,023 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,237 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1920715114, now seen corresponding path program 11 times [2021-06-05 14:30:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762256944] [2021-06-05 14:30:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762256944] [2021-06-05 14:30:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762256944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023467458] [2021-06-05 14:30:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:28,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023467458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:28,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:28,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:30:28,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611680439] [2021-06-05 14:30:28,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:28,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:28,443 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,684 INFO L93 Difference]: Finished difference Result 107 states and 205 transitions. [2021-06-05 14:30:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,685 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:30:28,685 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:30:28,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:30:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-06-05 14:30:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 14:30:28,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 14:30:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,690 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 14:30:28,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 14:30:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:28,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 14:30:28,905 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash -398863017, now seen corresponding path program 12 times [2021-06-05 14:30:28,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800218192] [2021-06-05 14:30:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800218192] [2021-06-05 14:30:28,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800218192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:28,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477803595] [2021-06-05 14:30:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477803595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830490827] [2021-06-05 14:30:29,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:29,057 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,181 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2021-06-05 14:30:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,182 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:30:29,182 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:30:29,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:30:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2021-06-05 14:30:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 14:30:29,185 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 14:30:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,185 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 14:30:29,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 14:30:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:29,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,185 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:29,408 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1526259110, now seen corresponding path program 13 times [2021-06-05 14:30:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174385007] [2021-06-05 14:30:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174385007] [2021-06-05 14:30:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174385007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571575565] [2021-06-05 14:30:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571575565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:30:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851837408] [2021-06-05 14:30:29,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:29,602 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,724 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 14:30:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,725 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:30:29,725 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:30:29,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:30:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 14:30:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.129032258064516) internal successors, (132), 62 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 132 transitions. [2021-06-05 14:30:29,728 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 132 transitions. Word has length 15 [2021-06-05 14:30:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,728 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 132 transitions. [2021-06-05 14:30:29,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 132 transitions. [2021-06-05 14:30:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:29,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,729 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:29,949 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash 843169243, now seen corresponding path program 14 times [2021-06-05 14:30:29,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255514553] [2021-06-05 14:30:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255514553] [2021-06-05 14:30:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255514553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443853054] [2021-06-05 14:30:30,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:30,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443853054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:30,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:30,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293487525] [2021-06-05 14:30:30,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:30,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:30,121 INFO L87 Difference]: Start difference. First operand 63 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:30,192 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2021-06-05 14:30:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:30,193 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:30:30,193 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:30:30,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:30:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-06-05 14:30:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-06-05 14:30:30,195 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-06-05 14:30:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:30,196 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-06-05 14:30:30,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-06-05 14:30:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:30,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:30,196 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:30,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 14:30:30,419 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1281477977, now seen corresponding path program 15 times [2021-06-05 14:30:30,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:30,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966950486] [2021-06-05 14:30:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966950486] [2021-06-05 14:30:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966950486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025917290] [2021-06-05 14:30:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:30,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025917290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:30,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480245258] [2021-06-05 14:30:30,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:30,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:30,574 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:30,701 INFO L93 Difference]: Finished difference Result 74 states and 153 transitions. [2021-06-05 14:30:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:30,703 INFO L225 Difference]: With dead ends: 74 [2021-06-05 14:30:30,703 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:30:30,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:30:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-06-05 14:30:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-06-05 14:30:30,705 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-06-05 14:30:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-06-05 14:30:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-06-05 14:30:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:30,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:30,706 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:30,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,917 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash -349166395, now seen corresponding path program 16 times [2021-06-05 14:30:30,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:30,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998988895] [2021-06-05 14:30:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998988895] [2021-06-05 14:30:30,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998988895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22082754] [2021-06-05 14:30:30,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:31,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22082754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:31,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:31,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248167795] [2021-06-05 14:30:31,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:31,102 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,141 INFO L93 Difference]: Finished difference Result 82 states and 169 transitions. [2021-06-05 14:30:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,145 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:30:31,145 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:30:31,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:30:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2021-06-05 14:30:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 127 transitions. [2021-06-05 14:30:31,147 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 127 transitions. Word has length 15 [2021-06-05 14:30:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,148 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 127 transitions. [2021-06-05 14:30:31,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 127 transitions. [2021-06-05 14:30:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:31,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,149 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 14:30:31,361 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -855512661, now seen corresponding path program 17 times [2021-06-05 14:30:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315377177] [2021-06-05 14:30:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315377177] [2021-06-05 14:30:31,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315377177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548556764] [2021-06-05 14:30:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548556764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:31,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887735194] [2021-06-05 14:30:31,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:31,543 INFO L87 Difference]: Start difference. First operand 61 states and 127 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,591 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 14:30:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,592 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:30:31,592 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:30:31,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:30:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2021-06-05 14:30:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 62 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 133 transitions. [2021-06-05 14:30:31,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 133 transitions. Word has length 15 [2021-06-05 14:30:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,595 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 133 transitions. [2021-06-05 14:30:31,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 133 transitions. [2021-06-05 14:30:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:31,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,595 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,809 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash 386519599, now seen corresponding path program 18 times [2021-06-05 14:30:31,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445089328] [2021-06-05 14:30:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445089328] [2021-06-05 14:30:31,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445089328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475820267] [2021-06-05 14:30:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475820267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:31,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:31,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461769284] [2021-06-05 14:30:31,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:31,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:31,955 INFO L87 Difference]: Start difference. First operand 63 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,000 INFO L93 Difference]: Finished difference Result 87 states and 169 transitions. [2021-06-05 14:30:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,001 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:30:32,001 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:30:32,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:30:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2021-06-05 14:30:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-06-05 14:30:32,004 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-06-05 14:30:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,004 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-06-05 14:30:32,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-06-05 14:30:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:32,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,004 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:32,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 14:30:32,220 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1759651161, now seen corresponding path program 19 times [2021-06-05 14:30:32,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:32,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146197109] [2021-06-05 14:30:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146197109] [2021-06-05 14:30:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146197109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645025151] [2021-06-05 14:30:32,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645025151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:32,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913999078] [2021-06-05 14:30:32,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:32,371 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,447 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2021-06-05 14:30:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,448 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:30:32,448 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:30:32,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:30:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-06-05 14:30:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-06-05 14:30:32,450 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-06-05 14:30:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,450 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-06-05 14:30:32,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-06-05 14:30:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:32,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,451 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 14:30:32,657 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -942940134, now seen corresponding path program 20 times [2021-06-05 14:30:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565060468] [2021-06-05 14:30:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565060468] [2021-06-05 14:30:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565060468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710881468] [2021-06-05 14:30:32,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:32,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710881468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:32,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:30:32,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561441825] [2021-06-05 14:30:32,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:32,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:32,840 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,889 INFO L93 Difference]: Finished difference Result 72 states and 144 transitions. [2021-06-05 14:30:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,889 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:30:32,889 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:30:32,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:30:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-06-05 14:30:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-06-05 14:30:32,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2021-06-05 14:30:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,895 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-06-05 14:30:32,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-06-05 14:30:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:32,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,895 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,109 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1010165383, now seen corresponding path program 21 times [2021-06-05 14:30:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144997917] [2021-06-05 14:30:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144997917] [2021-06-05 14:30:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144997917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891480924] [2021-06-05 14:30:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:33,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891480924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:33,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388819700] [2021-06-05 14:30:33,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:33,290 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,379 INFO L93 Difference]: Finished difference Result 70 states and 144 transitions. [2021-06-05 14:30:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,379 INFO L225 Difference]: With dead ends: 70 [2021-06-05 14:30:33,380 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 14:30:33,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 14:30:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-06-05 14:30:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-06-05 14:30:33,382 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2021-06-05 14:30:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-06-05 14:30:33,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-06-05 14:30:33,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:33,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,383 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,607 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705898, now seen corresponding path program 22 times [2021-06-05 14:30:33,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841201578] [2021-06-05 14:30:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841201578] [2021-06-05 14:30:33,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841201578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727092863] [2021-06-05 14:30:33,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:33,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727092863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:33,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:33,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968249225] [2021-06-05 14:30:33,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:33,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:33,777 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,819 INFO L93 Difference]: Finished difference Result 83 states and 161 transitions. [2021-06-05 14:30:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,820 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:30:33,820 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:30:33,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:30:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-06-05 14:30:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-06-05 14:30:33,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-06-05 14:30:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,822 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-06-05 14:30:33,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-06-05 14:30:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:33,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,823 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,037 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash -77853801, now seen corresponding path program 23 times [2021-06-05 14:30:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145994805] [2021-06-05 14:30:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145994805] [2021-06-05 14:30:34,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145994805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596928862] [2021-06-05 14:30:34,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596928862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:34,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:30:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431134545] [2021-06-05 14:30:34,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:34,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:34,177 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,212 INFO L93 Difference]: Finished difference Result 96 states and 190 transitions. [2021-06-05 14:30:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,213 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:30:34,213 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:30:34,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:30:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2021-06-05 14:30:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-06-05 14:30:34,216 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-06-05 14:30:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,216 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-06-05 14:30:34,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-06-05 14:30:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:34,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,217 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,433 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1205249894, now seen corresponding path program 24 times [2021-06-05 14:30:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672288757] [2021-06-05 14:30:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672288757] [2021-06-05 14:30:34,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672288757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779695768] [2021-06-05 14:30:34,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:34,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779695768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:34,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666553778] [2021-06-05 14:30:34,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:34,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:34,602 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,654 INFO L93 Difference]: Finished difference Result 68 states and 140 transitions. [2021-06-05 14:30:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:34,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,655 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:30:34,655 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:30:34,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:30:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-06-05 14:30:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-06-05 14:30:34,657 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-06-05 14:30:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,657 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-06-05 14:30:34,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-06-05 14:30:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:34,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,657 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 14:30:34,881 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1164178459, now seen corresponding path program 25 times [2021-06-05 14:30:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228782225] [2021-06-05 14:30:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228782225] [2021-06-05 14:30:34,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228782225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942101583] [2021-06-05 14:30:34,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942101583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:35,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549562187] [2021-06-05 14:30:35,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:35,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:35,071 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:35,121 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2021-06-05 14:30:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:35,122 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:30:35,122 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 14:30:35,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 14:30:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-06-05 14:30:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2021-06-05 14:30:35,124 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 15 [2021-06-05 14:30:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:35,124 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2021-06-05 14:30:35,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2021-06-05 14:30:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:35,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:35,124 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:35,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,341 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1973989497, now seen corresponding path program 26 times [2021-06-05 14:30:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97308388] [2021-06-05 14:30:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:35,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97308388] [2021-06-05 14:30:35,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97308388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819561804] [2021-06-05 14:30:35,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819561804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:35,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592062008] [2021-06-05 14:30:35,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:35,507 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:35,552 INFO L93 Difference]: Finished difference Result 83 states and 158 transitions. [2021-06-05 14:30:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:35,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:35,553 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:30:35,553 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:30:35,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:30:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-06-05 14:30:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 14:30:35,555 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 14:30:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:35,555 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 14:30:35,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 14:30:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:35,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:35,556 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:35,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 14:30:35,777 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1711596160, now seen corresponding path program 27 times [2021-06-05 14:30:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:35,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223055672] [2021-06-05 14:30:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:35,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223055672] [2021-06-05 14:30:35,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223055672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092709590] [2021-06-05 14:30:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092709590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:35,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:35,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150438861] [2021-06-05 14:30:35,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:35,920 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,017 INFO L93 Difference]: Finished difference Result 96 states and 181 transitions. [2021-06-05 14:30:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,018 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:30:36,018 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:30:36,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:30:36,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2021-06-05 14:30:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-06-05 14:30:36,021 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-06-05 14:30:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,021 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-06-05 14:30:36,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-06-05 14:30:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:36,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,021 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 14:30:36,222 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1173740582, now seen corresponding path program 28 times [2021-06-05 14:30:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653886468] [2021-06-05 14:30:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653886468] [2021-06-05 14:30:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653886468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107795674] [2021-06-05 14:30:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107795674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:36,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:30:36,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310818645] [2021-06-05 14:30:36,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:36,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:36,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:36,351 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,390 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 14:30:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,390 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:30:36,390 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:30:36,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:30:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 14:30:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 14:30:36,392 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 14:30:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,392 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 14:30:36,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 14:30:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:36,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,393 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,609 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1488338567, now seen corresponding path program 29 times [2021-06-05 14:30:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075960367] [2021-06-05 14:30:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075960367] [2021-06-05 14:30:36,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075960367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506410995] [2021-06-05 14:30:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506410995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:36,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:36,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532431891] [2021-06-05 14:30:36,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:36,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:36,779 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,845 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2021-06-05 14:30:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,845 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:30:36,845 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 14:30:36,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 14:30:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-06-05 14:30:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:30:36,847 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 14:30:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,847 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:30:36,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:30:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:36,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 14:30:37,061 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1065816366, now seen corresponding path program 30 times [2021-06-05 14:30:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296833399] [2021-06-05 14:30:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296833399] [2021-06-05 14:30:37,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296833399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129571661] [2021-06-05 14:30:37,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:37,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129571661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:37,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690230347] [2021-06-05 14:30:37,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:37,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:37,215 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,277 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 14:30:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,277 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:30:37,277 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:30:37,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:30:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-06-05 14:30:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:30:37,279 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:30:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,279 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:30:37,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:30:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:37,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,279 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 14:30:37,481 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 456035731, now seen corresponding path program 31 times [2021-06-05 14:30:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327771359] [2021-06-05 14:30:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327771359] [2021-06-05 14:30:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327771359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100877846] [2021-06-05 14:30:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100877846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:30:37,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598249874] [2021-06-05 14:30:37,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:37,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:37,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:37,692 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,788 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-05 14:30:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,789 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:30:37,789 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:30:37,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:30:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-06-05 14:30:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:30:37,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:30:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,791 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:30:37,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:30:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:37,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,792 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 14:30:38,015 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,015 INFO L82 PathProgramCache]: Analyzing trace with hash -671360362, now seen corresponding path program 32 times [2021-06-05 14:30:38,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195624303] [2021-06-05 14:30:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195624303] [2021-06-05 14:30:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195624303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427617375] [2021-06-05 14:30:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:38,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427617375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:38,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:38,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533952222] [2021-06-05 14:30:38,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:38,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:38,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:38,176 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,268 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2021-06-05 14:30:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,269 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:30:38,269 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:30:38,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:30:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-06-05 14:30:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:30:38,271 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:30:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,271 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:30:38,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:30:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:38,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,272 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:38,485 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1698067991, now seen corresponding path program 33 times [2021-06-05 14:30:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123529819] [2021-06-05 14:30:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123529819] [2021-06-05 14:30:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123529819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778583443] [2021-06-05 14:30:38,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:38,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778583443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:38,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:30:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790880266] [2021-06-05 14:30:38,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:38,654 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,813 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 14:30:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,814 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:30:38,814 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:30:38,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:30:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-06-05 14:30:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:30:38,816 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:30:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,816 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:30:38,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:30:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:38,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,817 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 14:30:39,021 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -133504784, now seen corresponding path program 34 times [2021-06-05 14:30:39,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040800706] [2021-06-05 14:30:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040800706] [2021-06-05 14:30:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040800706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309023495] [2021-06-05 14:30:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309023495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:30:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131870034] [2021-06-05 14:30:39,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:39,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:39,192 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,253 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 14:30:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,254 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:30:39,254 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:30:39,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:30:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 14:30:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:30:39,256 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:30:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,256 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:30:39,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:30:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:39,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,256 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,469 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash -448102769, now seen corresponding path program 35 times [2021-06-05 14:30:39,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742399320] [2021-06-05 14:30:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742399320] [2021-06-05 14:30:39,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742399320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703119902] [2021-06-05 14:30:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703119902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:39,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:30:39,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569802418] [2021-06-05 14:30:39,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:39,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:39,630 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,718 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-06-05 14:30:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,719 INFO L225 Difference]: With dead ends: 79 [2021-06-05 14:30:39,719 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:30:39,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:30:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-06-05 14:30:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 14:30:39,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 14:30:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,721 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 14:30:39,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 14:30:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:39,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,721 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 14:30:39,933 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 454240538, now seen corresponding path program 36 times [2021-06-05 14:30:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260143038] [2021-06-05 14:30:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260143038] [2021-06-05 14:30:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260143038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161261230] [2021-06-05 14:30:39,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:40,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161261230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:30:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702921005] [2021-06-05 14:30:40,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:40,047 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,102 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 14:30:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,103 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:30:40,104 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:30:40,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:30:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 14:30:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 14:30:40,105 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 14:30:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,105 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 14:30:40,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 14:30:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:30:40,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,106 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,321 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795301, now seen corresponding path program 37 times [2021-06-05 14:30:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843253557] [2021-06-05 14:30:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843253557] [2021-06-05 14:30:40,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843253557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312320236] [2021-06-05 14:30:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:30:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312320236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:40,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847202925] [2021-06-05 14:30:40,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:40,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:40,468 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,579 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 14:30:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:30:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,580 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:30:40,580 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 14:30:40,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 14:30:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 14:30:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 14:30:40,582 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 14:30:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,582 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 14:30:40,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 14:30:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:40,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 14:30:40,806 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1741313336, now seen corresponding path program 38 times [2021-06-05 14:30:40,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851170677] [2021-06-05 14:30:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:40,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851170677] [2021-06-05 14:30:40,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851170677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437339035] [2021-06-05 14:30:40,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:41,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:41,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:41,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:41,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:41,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:76, output treesize:35 [2021-06-05 14:30:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437339035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:41,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088045121] [2021-06-05 14:30:41,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:41,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:41,301 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,709 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-06-05 14:30:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,710 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:30:41,710 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:30:41,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:30:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-06-05 14:30:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 104 transitions. [2021-06-05 14:30:41,711 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 104 transitions. Word has length 16 [2021-06-05 14:30:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,711 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 104 transitions. [2021-06-05 14:30:41,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 104 transitions. [2021-06-05 14:30:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:41,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:41,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,912 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 712811384, now seen corresponding path program 39 times [2021-06-05 14:30:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985102543] [2021-06-05 14:30:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985102543] [2021-06-05 14:30:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985102543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501969091] [2021-06-05 14:30:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:30:42,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:30:42,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:30:42,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:30:42,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,906 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 14:30:42,907 INFO L628 ElimStorePlain]: treesize reduction 232, result has 31.4 percent of original size [2021-06-05 14:30:42,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:42,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:42,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:42,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:43,067 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-06-05 14:30:43,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:43,071 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:464, output treesize:59 [2021-06-05 14:30:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501969091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:43,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919381362] [2021-06-05 14:30:43,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:43,160 INFO L87 Difference]: Start difference. First operand 54 states and 104 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,504 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 14:30:43,658 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 14:30:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,157 INFO L93 Difference]: Finished difference Result 102 states and 198 transitions. [2021-06-05 14:30:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,158 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:30:44,158 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:30:44,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1170.4ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:30:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-06-05 14:30:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:30:44,161 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 16 [2021-06-05 14:30:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,161 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:30:44,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:30:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:44,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 14:30:44,377 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash 762508006, now seen corresponding path program 40 times [2021-06-05 14:30:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233478047] [2021-06-05 14:30:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233478047] [2021-06-05 14:30:44,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233478047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944268509] [2021-06-05 14:30:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:44,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:44,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:44,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:44,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:44,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:44,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:44,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:44,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:35 [2021-06-05 14:30:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944268509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:44,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:30:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944526306] [2021-06-05 14:30:44,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:44,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:44,984 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,154 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 14:30:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,192 INFO L93 Difference]: Finished difference Result 80 states and 150 transitions. [2021-06-05 14:30:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,193 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:30:45,193 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 14:30:45,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 14:30:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-06-05 14:30:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 123 transitions. [2021-06-05 14:30:45,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 123 transitions. Word has length 16 [2021-06-05 14:30:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,198 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 123 transitions. [2021-06-05 14:30:45,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 123 transitions. [2021-06-05 14:30:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:45,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:45,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,421 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash 105742242, now seen corresponding path program 41 times [2021-06-05 14:30:45,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:45,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513032974] [2021-06-05 14:30:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:45,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513032974] [2021-06-05 14:30:45,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513032974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893415878] [2021-06-05 14:30:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:45,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:45,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:45,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:45,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:45,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,959 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:30:45,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:45,960 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:131, output treesize:43 [2021-06-05 14:30:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893415878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:46,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:30:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107394347] [2021-06-05 14:30:46,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:46,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:46,025 INFO L87 Difference]: Start difference. First operand 62 states and 123 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,472 INFO L93 Difference]: Finished difference Result 81 states and 159 transitions. [2021-06-05 14:30:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,472 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:30:46,472 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:30:46,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:30:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-06-05 14:30:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 14:30:46,474 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 16 [2021-06-05 14:30:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,474 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 14:30:46,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 14:30:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:46,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,681 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 500198246, now seen corresponding path program 42 times [2021-06-05 14:30:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719047008] [2021-06-05 14:30:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719047008] [2021-06-05 14:30:46,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719047008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214220302] [2021-06-05 14:30:46,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:47,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:47,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:47,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:47,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:47,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:47,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:47,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:47,221 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:147, output treesize:58 [2021-06-05 14:30:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214220302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:47,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:30:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102588221] [2021-06-05 14:30:47,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:47,351 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,858 INFO L93 Difference]: Finished difference Result 110 states and 202 transitions. [2021-06-05 14:30:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,859 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:30:47,859 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:30:47,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 750.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:30:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-06-05 14:30:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 132 transitions. [2021-06-05 14:30:47,861 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 132 transitions. Word has length 16 [2021-06-05 14:30:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,861 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 132 transitions. [2021-06-05 14:30:47,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 132 transitions. [2021-06-05 14:30:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:47,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 14:30:48,069 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -400604024, now seen corresponding path program 43 times [2021-06-05 14:30:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764069091] [2021-06-05 14:30:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764069091] [2021-06-05 14:30:48,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764069091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175200210] [2021-06-05 14:30:48,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:48,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:48,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:48,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:48,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:48,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:48,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:48,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:48,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:48,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,576 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-05 14:30:48,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:48,577 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:220, output treesize:43 [2021-06-05 14:30:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175200210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:48,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:30:48,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013580892] [2021-06-05 14:30:48,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:48,636 INFO L87 Difference]: Start difference. First operand 65 states and 132 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,277 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-06-05 14:30:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,278 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:30:49,278 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:30:49,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:30:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2021-06-05 14:30:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 137 transitions. [2021-06-05 14:30:49,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 137 transitions. Word has length 16 [2021-06-05 14:30:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,280 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 137 transitions. [2021-06-05 14:30:49,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 137 transitions. [2021-06-05 14:30:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:49,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 14:30:49,494 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash -6148020, now seen corresponding path program 44 times [2021-06-05 14:30:49,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887519956] [2021-06-05 14:30:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887519956] [2021-06-05 14:30:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887519956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046954252] [2021-06-05 14:30:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:49,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:49,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:49,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:49,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:49,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:49,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:49,896 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,951 INFO L628 ElimStorePlain]: treesize reduction 43, result has 54.7 percent of original size [2021-06-05 14:30:49,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:49,952 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-06-05 14:30:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046954252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:50,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:50,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:30:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852634390] [2021-06-05 14:30:50,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:50,068 INFO L87 Difference]: Start difference. First operand 67 states and 137 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,441 INFO L93 Difference]: Finished difference Result 88 states and 175 transitions. [2021-06-05 14:30:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,442 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:30:50,442 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:30:50,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:30:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-06-05 14:30:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2021-06-05 14:30:50,444 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 16 [2021-06-05 14:30:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,444 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2021-06-05 14:30:50,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2021-06-05 14:30:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:50,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 14:30:50,661 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash 531707558, now seen corresponding path program 45 times [2021-06-05 14:30:50,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772152488] [2021-06-05 14:30:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772152488] [2021-06-05 14:30:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772152488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498518986] [2021-06-05 14:30:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:50,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:51,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:51,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:51,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:51,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:51,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:51,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:51,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:51,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:115, output treesize:58 [2021-06-05 14:30:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498518986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:51,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:51,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:30:51,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770366598] [2021-06-05 14:30:51,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:51,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:51,261 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,803 INFO L93 Difference]: Finished difference Result 113 states and 217 transitions. [2021-06-05 14:30:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:30:51,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,803 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:30:51,803 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:30:51,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 760.9ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:30:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-06-05 14:30:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 139 transitions. [2021-06-05 14:30:51,805 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 139 transitions. Word has length 16 [2021-06-05 14:30:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,805 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 139 transitions. [2021-06-05 14:30:51,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 139 transitions. [2021-06-05 14:30:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:51,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,021 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1991864008, now seen corresponding path program 46 times [2021-06-05 14:30:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650510898] [2021-06-05 14:30:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650510898] [2021-06-05 14:30:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650510898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886185607] [2021-06-05 14:30:52,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:52,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:52,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:52,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:52,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:35 [2021-06-05 14:30:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886185607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:30:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434161843] [2021-06-05 14:30:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:30:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:30:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:52,553 INFO L87 Difference]: Start difference. First operand 68 states and 139 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,718 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-05 14:30:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,719 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:30:52,719 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:30:52,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:30:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-06-05 14:30:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 145 transitions. [2021-06-05 14:30:52,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 145 transitions. Word has length 16 [2021-06-05 14:30:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,721 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 145 transitions. [2021-06-05 14:30:52,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 145 transitions. [2021-06-05 14:30:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:52,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:52,933 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1646337524, now seen corresponding path program 47 times [2021-06-05 14:30:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742566627] [2021-06-05 14:30:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:53,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742566627] [2021-06-05 14:30:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742566627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950579078] [2021-06-05 14:30:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:53,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:53,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:53,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,442 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:30:53,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:53,443 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:190, output treesize:43 [2021-06-05 14:30:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950579078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:53,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:53,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819433135] [2021-06-05 14:30:53,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:53,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:53,505 INFO L87 Difference]: Start difference. First operand 71 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:53,920 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 14:30:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:53,921 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:30:53,921 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:30:53,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:30:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-05 14:30:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 14:30:53,923 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 14:30:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:53,923 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 14:30:53,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 14:30:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:53,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:53,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 14:30:54,124 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2040793528, now seen corresponding path program 48 times [2021-06-05 14:30:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328613316] [2021-06-05 14:30:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328613316] [2021-06-05 14:30:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328613316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:54,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128163017] [2021-06-05 14:30:54,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:54,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:54,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:54,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:54,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:54,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:54,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:54,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:54,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:54,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:54,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,544 INFO L628 ElimStorePlain]: treesize reduction 43, result has 54.7 percent of original size [2021-06-05 14:30:54,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:54,546 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-06-05 14:30:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128163017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:54,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:54,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:30:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760630886] [2021-06-05 14:30:54,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:54,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:54,661 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,053 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-06-05 14:30:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:55,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,054 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:30:55,054 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:30:55,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:30:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2021-06-05 14:30:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 145 transitions. [2021-06-05 14:30:55,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 145 transitions. Word has length 16 [2021-06-05 14:30:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,056 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 145 transitions. [2021-06-05 14:30:55,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 145 transitions. [2021-06-05 14:30:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:55,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:55,269 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1139991258, now seen corresponding path program 49 times [2021-06-05 14:30:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937311605] [2021-06-05 14:30:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937311605] [2021-06-05 14:30:55,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937311605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221337188] [2021-06-05 14:30:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:55,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:55,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:55,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:55,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:55,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:55,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:55,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,760 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:30:55,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:55,761 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:156, output treesize:43 [2021-06-05 14:30:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221337188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:55,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:55,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993345787] [2021-06-05 14:30:55,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:55,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:55,823 INFO L87 Difference]: Start difference. First operand 71 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:56,157 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-06-05 14:30:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:56,157 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:30:56,157 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:30:56,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:30:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-06-05 14:30:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-06-05 14:30:56,159 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 16 [2021-06-05 14:30:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:56,159 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-06-05 14:30:56,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-06-05 14:30:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:56,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:56,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 14:30:56,360 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1534447262, now seen corresponding path program 50 times [2021-06-05 14:30:56,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538877793] [2021-06-05 14:30:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:56,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538877793] [2021-06-05 14:30:56,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538877793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539660208] [2021-06-05 14:30:56,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:56,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:56,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:56,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:56,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:56,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,753 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.2 percent of original size [2021-06-05 14:30:56,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:56,754 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-06-05 14:30:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539660208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:56,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:56,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911292745] [2021-06-05 14:30:56,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:56,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:56,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:56,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:56,870 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,274 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2021-06-05 14:30:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:57,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,274 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:30:57,274 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:30:57,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:30:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2021-06-05 14:30:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 147 transitions. [2021-06-05 14:30:57,278 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 147 transitions. Word has length 16 [2021-06-05 14:30:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,278 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 147 transitions. [2021-06-05 14:30:57,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 147 transitions. [2021-06-05 14:30:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:57,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 14:30:57,495 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2072302840, now seen corresponding path program 51 times [2021-06-05 14:30:57,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762531784] [2021-06-05 14:30:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762531784] [2021-06-05 14:30:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762531784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:57,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148049458] [2021-06-05 14:30:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:57,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:57,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:57,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:57,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:57,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:30:57,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:30:57,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:57,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:57,895 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:147, output treesize:58 [2021-06-05 14:30:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148049458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:58,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:58,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114908145] [2021-06-05 14:30:58,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:58,005 INFO L87 Difference]: Start difference. First operand 72 states and 147 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,330 INFO L93 Difference]: Finished difference Result 108 states and 212 transitions. [2021-06-05 14:30:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,331 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:30:58,331 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:30:58,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:30:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-06-05 14:30:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2021-06-05 14:30:58,332 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 16 [2021-06-05 14:30:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,332 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 152 transitions. [2021-06-05 14:30:58,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 152 transitions. [2021-06-05 14:30:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:58,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 14:30:58,549 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1671841100, now seen corresponding path program 52 times [2021-06-05 14:30:58,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538433593] [2021-06-05 14:30:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538433593] [2021-06-05 14:30:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538433593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816509333] [2021-06-05 14:30:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:30:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:58,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:58,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:58,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:58,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:58,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:58,990 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,029 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:30:59,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:59,030 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:156, output treesize:43 [2021-06-05 14:30:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816509333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:59,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:30:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822381373] [2021-06-05 14:30:59,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:30:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:30:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:59,080 INFO L87 Difference]: Start difference. First operand 74 states and 152 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,435 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2021-06-05 14:30:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:59,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:30:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,436 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:30:59,436 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:30:59,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:30:59,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-06-05 14:30:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-06-05 14:30:59,439 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-06-05 14:30:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,439 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-06-05 14:30:59,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-06-05 14:30:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:30:59,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 14:30:59,649 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1277385096, now seen corresponding path program 53 times [2021-06-05 14:30:59,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137912997] [2021-06-05 14:30:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137912997] [2021-06-05 14:30:59,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137912997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897033776] [2021-06-05 14:30:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:59,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:30:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:00,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:00,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:00,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:00,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:00,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:00,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,166 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-06-05 14:31:00,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:00,171 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:145, output treesize:58 [2021-06-05 14:31:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897033776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:00,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028251168] [2021-06-05 14:31:00,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:00,268 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:00,649 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-06-05 14:31:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:00,650 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:00,650 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:31:00,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:31:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:31:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2021-06-05 14:31:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-06-05 14:31:00,652 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 16 [2021-06-05 14:31:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:00,652 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-06-05 14:31:00,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-06-05 14:31:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:00,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:00,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:00,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:00,861 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash -739529518, now seen corresponding path program 54 times [2021-06-05 14:31:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:00,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092941099] [2021-06-05 14:31:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092941099] [2021-06-05 14:31:01,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092941099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401594963] [2021-06-05 14:31:01,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:01,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:01,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:01,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:01,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:01,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:01,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:01,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:01,232 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:01,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,280 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-06-05 14:31:01,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:01,280 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:211, output treesize:52 [2021-06-05 14:31:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401594963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:01,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:31:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323342260] [2021-06-05 14:31:01,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:01,392 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:01,689 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2021-06-05 14:31:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:01,690 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:31:01,690 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:31:01,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:31:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:31:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2021-06-05 14:31:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-06-05 14:31:01,691 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-06-05 14:31:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:01,691 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-06-05 14:31:01,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-06-05 14:31:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:01,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:01,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:01,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 14:31:01,892 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1245875784, now seen corresponding path program 55 times [2021-06-05 14:31:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:01,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742593349] [2021-06-05 14:31:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:02,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742593349] [2021-06-05 14:31:02,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742593349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920782041] [2021-06-05 14:31:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:02,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:02,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:02,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:02,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:02,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:02,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,413 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-06-05 14:31:02,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:02,414 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-06-05 14:31:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920782041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:02,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:31:02,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012454435] [2021-06-05 14:31:02,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:31:02,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:31:02,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:02,505 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:02,874 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2021-06-05 14:31:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:02,874 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:31:02,874 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:31:02,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:31:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-06-05 14:31:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 14:31:02,876 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 16 [2021-06-05 14:31:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:02,876 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 14:31:02,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 14:31:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:02,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:02,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:03,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,093 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2123859110, now seen corresponding path program 56 times [2021-06-05 14:31:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543588335] [2021-06-05 14:31:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543588335] [2021-06-05 14:31:03,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543588335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242978018] [2021-06-05 14:31:03,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:03,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:03,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:03,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:03,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:03,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:03,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:03,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:03,771 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:03,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:03,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:03,812 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:375, output treesize:35 [2021-06-05 14:31:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242978018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:03,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991150211] [2021-06-05 14:31:03,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:03,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:03,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:03,858 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:04,102 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-06-05 14:31:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:04,102 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:04,102 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:31:04,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:31:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2021-06-05 14:31:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 14:31:04,104 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 16 [2021-06-05 14:31:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:04,104 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 14:31:04,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 14:31:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:04,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:04,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:04,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 14:31:04,309 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1467093346, now seen corresponding path program 57 times [2021-06-05 14:31:04,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:04,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961242064] [2021-06-05 14:31:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:04,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961242064] [2021-06-05 14:31:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961242064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848562460] [2021-06-05 14:31:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:04,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:04,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:04,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:04,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:04,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:04,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:05,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:05,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:273, output treesize:35 [2021-06-05 14:31:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848562460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618379668] [2021-06-05 14:31:05,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:05,067 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:05,354 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-05 14:31:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:05,355 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:31:05,355 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:31:05,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:31:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-06-05 14:31:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 169 transitions. [2021-06-05 14:31:05,357 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 169 transitions. Word has length 16 [2021-06-05 14:31:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:05,357 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 169 transitions. [2021-06-05 14:31:05,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 169 transitions. [2021-06-05 14:31:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:05,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:05,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:05,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:05,558 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1861549350, now seen corresponding path program 58 times [2021-06-05 14:31:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:05,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392868857] [2021-06-05 14:31:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392868857] [2021-06-05 14:31:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392868857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281498183] [2021-06-05 14:31:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:05,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:06,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:06,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:06,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:06,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:06,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:06,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:06,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:06,383 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:06,388 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:06,392 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:06,397 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:06,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:06,406 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:06,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:06,454 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:58 [2021-06-05 14:31:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281498183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:06,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:06,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694034561] [2021-06-05 14:31:06,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:06,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:06,549 INFO L87 Difference]: Start difference. First operand 82 states and 169 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:06,750 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 14:31:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:06,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:06,750 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:31:06,750 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:31:06,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:31:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2021-06-05 14:31:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-06-05 14:31:06,752 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 16 [2021-06-05 14:31:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:06,752 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-06-05 14:31:06,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-06-05 14:31:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:06,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:06,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:06,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 14:31:06,969 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash 960747080, now seen corresponding path program 59 times [2021-06-05 14:31:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:06,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82637393] [2021-06-05 14:31:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:07,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:07,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82637393] [2021-06-05 14:31:07,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82637393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290858026] [2021-06-05 14:31:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:07,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:07,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:07,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:07,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:07,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:07,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:07,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:07,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,334 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:31:07,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:07,335 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:131, output treesize:43 [2021-06-05 14:31:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:07,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290858026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:07,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:31:07,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285505689] [2021-06-05 14:31:07,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:07,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:07,390 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:07,620 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 14:31:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:07,620 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:31:07,620 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:31:07,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:31:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-06-05 14:31:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 14:31:07,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 16 [2021-06-05 14:31:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:07,622 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 14:31:07,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 14:31:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:07,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:07,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:07,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:07,825 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1355203084, now seen corresponding path program 60 times [2021-06-05 14:31:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:07,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381344403] [2021-06-05 14:31:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:08,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381344403] [2021-06-05 14:31:08,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381344403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419083703] [2021-06-05 14:31:08,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:08,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:08,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:08,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:08,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:08,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:08,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:08,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:08,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:08,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:08,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:08,600 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:08,605 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:08,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:08,661 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:58 [2021-06-05 14:31:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419083703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:08,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297157257] [2021-06-05 14:31:08,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:08,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:08,772 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:09,321 INFO L93 Difference]: Finished difference Result 178 states and 326 transitions. [2021-06-05 14:31:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:31:09,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:09,322 INFO L225 Difference]: With dead ends: 178 [2021-06-05 14:31:09,322 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:31:09,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:31:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 87. [2021-06-05 14:31:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-06-05 14:31:09,323 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-06-05 14:31:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:09,323 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-06-05 14:31:09,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-06-05 14:31:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:09,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:09,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:09,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 14:31:09,524 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1893058662, now seen corresponding path program 61 times [2021-06-05 14:31:09,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:09,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044277298] [2021-06-05 14:31:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:09,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044277298] [2021-06-05 14:31:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044277298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148466862] [2021-06-05 14:31:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:09,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:09,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:09,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:09,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:09,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:09,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,909 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-06-05 14:31:09,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:09,910 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:146, output treesize:52 [2021-06-05 14:31:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148466862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:09,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:09,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762975376] [2021-06-05 14:31:09,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:09,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:09,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:09,999 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:10,189 INFO L93 Difference]: Finished difference Result 106 states and 218 transitions. [2021-06-05 14:31:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:10,190 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:31:10,190 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:31:10,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:31:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-06-05 14:31:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2021-06-05 14:31:10,193 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 16 [2021-06-05 14:31:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:10,193 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2021-06-05 14:31:10,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2021-06-05 14:31:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:10,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:10,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:10,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:10,416 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1851085278, now seen corresponding path program 62 times [2021-06-05 14:31:10,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:10,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532839927] [2021-06-05 14:31:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532839927] [2021-06-05 14:31:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532839927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037370164] [2021-06-05 14:31:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:10,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:11,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:11,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:11,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:11,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:11,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:11,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:11,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:11,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:11,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:11,123 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:371, output treesize:35 [2021-06-05 14:31:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037370164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:11,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:31:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326162322] [2021-06-05 14:31:11,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:11,174 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:11,411 INFO L93 Difference]: Finished difference Result 109 states and 221 transitions. [2021-06-05 14:31:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:11,412 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:31:11,412 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:31:11,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:31:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-06-05 14:31:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:31:11,413 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:31:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:11,413 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:31:11,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:31:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:11,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:11,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:11,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-06-05 14:31:11,614 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1456629274, now seen corresponding path program 63 times [2021-06-05 14:31:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:11,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741464095] [2021-06-05 14:31:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:11,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:11,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741464095] [2021-06-05 14:31:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741464095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160474712] [2021-06-05 14:31:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:11,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:12,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:12,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:12,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:12,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:31:12,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:12,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:12,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:12,159 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:12,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:12,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,278 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:31:12,278 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.3 percent of original size [2021-06-05 14:31:12,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:12,280 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:71 [2021-06-05 14:31:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160474712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:12,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:31:12,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923802514] [2021-06-05 14:31:12,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:12,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:12,400 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:12,634 INFO L93 Difference]: Finished difference Result 106 states and 218 transitions. [2021-06-05 14:31:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:12,635 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:31:12,635 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:31:12,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:31:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2021-06-05 14:31:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:31:12,636 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:31:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:12,636 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:31:12,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:31:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:12,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:12,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:12,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable806 [2021-06-05 14:31:12,849 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -918773696, now seen corresponding path program 64 times [2021-06-05 14:31:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:12,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915742759] [2021-06-05 14:31:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:13,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:13,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915742759] [2021-06-05 14:31:13,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915742759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:13,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716764639] [2021-06-05 14:31:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:13,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:31:13,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-06-05 14:31:13,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:13,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:13,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:13,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:13,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:13,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:13,382 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:13,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:13,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:13,395 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:13,400 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,463 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 14:31:13,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:13,464 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:515, output treesize:52 [2021-06-05 14:31:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716764639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:13,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:13,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:31:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898898775] [2021-06-05 14:31:13,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:13,548 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:13,825 INFO L93 Difference]: Finished difference Result 111 states and 229 transitions. [2021-06-05 14:31:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:13,826 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:31:13,826 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:31:13,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:31:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2021-06-05 14:31:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:31:13,827 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:31:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:13,827 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:31:13,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:31:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:13,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:13,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:14,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-05 14:31:14,028 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1425119962, now seen corresponding path program 65 times [2021-06-05 14:31:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:14,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682490320] [2021-06-05 14:31:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682490320] [2021-06-05 14:31:14,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682490320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920850395] [2021-06-05 14:31:14,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:14,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:14,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:14,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:14,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:14,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:14,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:14,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:14,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,430 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.3 percent of original size [2021-06-05 14:31:14,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:14,431 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:207, output treesize:52 [2021-06-05 14:31:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920850395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:14,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133888234] [2021-06-05 14:31:14,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:14,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:14,533 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:14,917 INFO L93 Difference]: Finished difference Result 114 states and 235 transitions. [2021-06-05 14:31:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:14,918 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:31:14,918 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:31:14,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:31:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2021-06-05 14:31:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:31:14,919 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:31:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:14,920 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:31:14,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:31:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:14,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:14,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:15,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:15,125 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash 331453388, now seen corresponding path program 66 times [2021-06-05 14:31:15,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:15,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088582599] [2021-06-05 14:31:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:15,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088582599] [2021-06-05 14:31:15,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088582599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631126265] [2021-06-05 14:31:15,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:15,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:15,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:15,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:15,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:31:15,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:15,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:15,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:15,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:15,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:15,834 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:15,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:15,869 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:375, output treesize:35 [2021-06-05 14:31:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631126265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:15,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574778185] [2021-06-05 14:31:15,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:15,924 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:16,204 INFO L93 Difference]: Finished difference Result 114 states and 231 transitions. [2021-06-05 14:31:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:16,204 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:31:16,204 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:31:16,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:31:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2021-06-05 14:31:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-06-05 14:31:16,206 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 16 [2021-06-05 14:31:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:16,207 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-06-05 14:31:16,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-06-05 14:31:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:16,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:16,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:16,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable914 [2021-06-05 14:31:16,413 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash 725909392, now seen corresponding path program 67 times [2021-06-05 14:31:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:16,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75944179] [2021-06-05 14:31:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:16,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75944179] [2021-06-05 14:31:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75944179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690950749] [2021-06-05 14:31:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:16,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:16,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:17,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:17,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:17,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:17,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:17,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:31:17,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:17,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:31:17,042 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:17,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:17,051 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:17,057 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:17,062 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:17,067 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,182 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 14:31:17,184 INFO L628 ElimStorePlain]: treesize reduction 40, result has 77.1 percent of original size [2021-06-05 14:31:17,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:17,186 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:626, output treesize:71 [2021-06-05 14:31:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690950749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:17,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:17,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260484177] [2021-06-05 14:31:17,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:17,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:17,312 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:17,639 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-06-05 14:31:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:17,639 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:31:17,639 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:31:17,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:31:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2021-06-05 14:31:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 188 transitions. [2021-06-05 14:31:17,641 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 188 transitions. Word has length 16 [2021-06-05 14:31:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:17,641 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 188 transitions. [2021-06-05 14:31:17,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 188 transitions. [2021-06-05 14:31:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:17,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:17,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:17,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:17,853 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1263764970, now seen corresponding path program 68 times [2021-06-05 14:31:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:17,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368609479] [2021-06-05 14:31:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:18,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368609479] [2021-06-05 14:31:18,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368609479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:18,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735297772] [2021-06-05 14:31:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:18,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:18,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-06-05 14:31:18,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:18,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:31:18,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:31:18,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:18,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:18,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:31:18,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:31:18,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,680 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:31:18,685 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.3 percent of original size [2021-06-05 14:31:18,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:18,687 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:71 [2021-06-05 14:31:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735297772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:18,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:18,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239323347] [2021-06-05 14:31:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:18,799 INFO L87 Difference]: Start difference. First operand 90 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:19,068 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2021-06-05 14:31:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:19,069 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:31:19,069 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:31:19,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:31:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-06-05 14:31:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1136363636363638) internal successors, (186), 88 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 186 transitions. [2021-06-05 14:31:19,071 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 186 transitions. Word has length 16 [2021-06-05 14:31:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:19,071 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 186 transitions. [2021-06-05 14:31:19,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 186 transitions. [2021-06-05 14:31:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:19,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:19,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:19,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-05 14:31:19,281 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash 757418704, now seen corresponding path program 69 times [2021-06-05 14:31:19,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:19,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414537887] [2021-06-05 14:31:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414537887] [2021-06-05 14:31:19,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414537887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818606212] [2021-06-05 14:31:19,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:19,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:19,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:19,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:19,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:19,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:19,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:19,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:19,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:19,675 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,740 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:31:19,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:19,741 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:58 [2021-06-05 14:31:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818606212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:19,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:31:19,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137908698] [2021-06-05 14:31:19,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:19,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:19,850 INFO L87 Difference]: Start difference. First operand 89 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:20,057 INFO L93 Difference]: Finished difference Result 121 states and 247 transitions. [2021-06-05 14:31:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:20,058 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:31:20,058 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:31:20,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:31:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-06-05 14:31:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1333333333333333) internal successors, (192), 90 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 192 transitions. [2021-06-05 14:31:20,060 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 192 transitions. Word has length 16 [2021-06-05 14:31:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:20,060 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 192 transitions. [2021-06-05 14:31:20,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 192 transitions. [2021-06-05 14:31:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:31:20,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:20,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:20,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,277 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1797654502, now seen corresponding path program 70 times [2021-06-05 14:31:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183809434] [2021-06-05 14:31:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:20,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183809434] [2021-06-05 14:31:20,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183809434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139000015] [2021-06-05 14:31:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:20,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:31:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:20,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:20,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:20,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:20,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:20,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:20,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:20,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:20,746 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:183, output treesize:58 [2021-06-05 14:31:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139000015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:20,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:31:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545215244] [2021-06-05 14:31:20,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:31:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:31:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:20,847 INFO L87 Difference]: Start difference. First operand 91 states and 192 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:21,301 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-06-05 14:31:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:31:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:21,302 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:31:21,302 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:31:21,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:31:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2021-06-05 14:31:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 14:31:21,304 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 16 [2021-06-05 14:31:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:21,304 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 14:31:21,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 14:31:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:21,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:21,304 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:21,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,521 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1403613350, now seen corresponding path program 71 times [2021-06-05 14:31:21,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:21,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515399770] [2021-06-05 14:31:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:21,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515399770] [2021-06-05 14:31:21,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515399770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088971014] [2021-06-05 14:31:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088971014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:21,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:31:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935522362] [2021-06-05 14:31:21,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:31:21,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:21,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:31:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:21,700 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:21,772 INFO L93 Difference]: Finished difference Result 132 states and 269 transitions. [2021-06-05 14:31:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:21,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:21,773 INFO L225 Difference]: With dead ends: 132 [2021-06-05 14:31:21,773 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 14:31:21,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 14:31:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2021-06-05 14:31:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 94 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 201 transitions. [2021-06-05 14:31:21,777 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 201 transitions. Word has length 17 [2021-06-05 14:31:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:21,777 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 201 transitions. [2021-06-05 14:31:21,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 201 transitions. [2021-06-05 14:31:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:21,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:21,778 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:21,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1122,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,997 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -298435961, now seen corresponding path program 72 times [2021-06-05 14:31:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:21,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062871582] [2021-06-05 14:31:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062871582] [2021-06-05 14:31:22,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062871582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370081459] [2021-06-05 14:31:22,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370081459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:22,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430117634] [2021-06-05 14:31:22,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:22,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:22,202 INFO L87 Difference]: Start difference. First operand 95 states and 201 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:22,313 INFO L93 Difference]: Finished difference Result 130 states and 260 transitions. [2021-06-05 14:31:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:22,313 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:31:22,313 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:31:22,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:31:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-06-05 14:31:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.129032258064516) internal successors, (198), 93 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 198 transitions. [2021-06-05 14:31:22,315 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 198 transitions. Word has length 17 [2021-06-05 14:31:22,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:22,315 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 198 transitions. [2021-06-05 14:31:22,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 198 transitions. [2021-06-05 14:31:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:22,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:22,316 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:22,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-05 14:31:22,529 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1912548616, now seen corresponding path program 73 times [2021-06-05 14:31:22,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:22,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265086706] [2021-06-05 14:31:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265086706] [2021-06-05 14:31:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265086706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343633289] [2021-06-05 14:31:22,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:22,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343633289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:22,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:22,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946810894] [2021-06-05 14:31:22,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:22,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:22,705 INFO L87 Difference]: Start difference. First operand 94 states and 198 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:22,776 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2021-06-05 14:31:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:22,777 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:31:22,777 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:31:22,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:31:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-06-05 14:31:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 14:31:22,779 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-06-05 14:31:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:22,779 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 14:31:22,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 14:31:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:22,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:22,779 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:22,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,993 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 816661835, now seen corresponding path program 74 times [2021-06-05 14:31:22,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:22,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77720216] [2021-06-05 14:31:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77720216] [2021-06-05 14:31:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77720216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634223682] [2021-06-05 14:31:23,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:23,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:23,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634223682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:23,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:23,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168281431] [2021-06-05 14:31:23,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:23,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:23,236 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:23,334 INFO L93 Difference]: Finished difference Result 128 states and 257 transitions. [2021-06-05 14:31:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:23,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:23,335 INFO L225 Difference]: With dead ends: 128 [2021-06-05 14:31:23,335 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:31:23,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:31:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 95. [2021-06-05 14:31:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 14:31:23,337 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-06-05 14:31:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:23,337 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 14:31:23,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 14:31:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:23,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:23,338 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:23,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,557 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash 749436586, now seen corresponding path program 75 times [2021-06-05 14:31:23,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:23,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379896568] [2021-06-05 14:31:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379896568] [2021-06-05 14:31:23,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379896568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727182131] [2021-06-05 14:31:23,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:23,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727182131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:23,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261316795] [2021-06-05 14:31:23,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:23,839 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:24,068 INFO L93 Difference]: Finished difference Result 120 states and 248 transitions. [2021-06-05 14:31:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:24,068 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:24,068 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:31:24,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:31:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 14:31:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:24,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:24,070 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:24,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:24,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:24,071 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:24,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-05 14:31:24,287 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash 159896071, now seen corresponding path program 76 times [2021-06-05 14:31:24,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:24,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986623729] [2021-06-05 14:31:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986623729] [2021-06-05 14:31:24,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986623729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600477512] [2021-06-05 14:31:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:24,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:24,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600477512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:24,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699848086] [2021-06-05 14:31:24,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:24,518 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:24,681 INFO L93 Difference]: Finished difference Result 131 states and 264 transitions. [2021-06-05 14:31:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:24,682 INFO L225 Difference]: With dead ends: 131 [2021-06-05 14:31:24,682 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:31:24,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:31:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2021-06-05 14:31:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:24,683 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:24,683 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:24,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:24,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:24,684 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:24,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-06-05 14:31:24,884 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1681748168, now seen corresponding path program 77 times [2021-06-05 14:31:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295391407] [2021-06-05 14:31:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:24,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295391407] [2021-06-05 14:31:24,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295391407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467636194] [2021-06-05 14:31:24,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:25,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:25,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467636194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:25,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856880275] [2021-06-05 14:31:25,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:25,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:25,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:25,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:25,122 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:25,387 INFO L93 Difference]: Finished difference Result 124 states and 255 transitions. [2021-06-05 14:31:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:25,388 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:31:25,388 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:31:25,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:31:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-06-05 14:31:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:25,389 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:25,389 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:25,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:25,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:25,389 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:25,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:25,593 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash -841823398, now seen corresponding path program 78 times [2021-06-05 14:31:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:25,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659331828] [2021-06-05 14:31:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:25,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659331828] [2021-06-05 14:31:25,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659331828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058972620] [2021-06-05 14:31:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:25,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:25,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058972620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:25,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863058283] [2021-06-05 14:31:25,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:25,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:25,798 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:25,856 INFO L93 Difference]: Finished difference Result 114 states and 237 transitions. [2021-06-05 14:31:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:25,857 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:31:25,857 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:31:25,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:31:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-06-05 14:31:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:25,859 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:25,859 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:25,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:25,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:25,859 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:26,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,060 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1937710179, now seen corresponding path program 79 times [2021-06-05 14:31:26,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:26,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482840779] [2021-06-05 14:31:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:26,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482840779] [2021-06-05 14:31:26,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482840779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050228935] [2021-06-05 14:31:26,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050228935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:26,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:26,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746440146] [2021-06-05 14:31:26,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:26,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:26,273 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:26,347 INFO L93 Difference]: Finished difference Result 109 states and 223 transitions. [2021-06-05 14:31:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:26,348 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:31:26,348 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:26,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-06-05 14:31:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 206 transitions. [2021-06-05 14:31:26,349 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 206 transitions. Word has length 17 [2021-06-05 14:31:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:26,349 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 206 transitions. [2021-06-05 14:31:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 206 transitions. [2021-06-05 14:31:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:26,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:26,350 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:26,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 14:31:26,572 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:26,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2004935428, now seen corresponding path program 80 times [2021-06-05 14:31:26,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:26,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442679360] [2021-06-05 14:31:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:26,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442679360] [2021-06-05 14:31:26,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442679360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570516052] [2021-06-05 14:31:26,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570516052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:26,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:26,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644080812] [2021-06-05 14:31:26,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:26,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:26,854 INFO L87 Difference]: Start difference. First operand 98 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:26,955 INFO L93 Difference]: Finished difference Result 127 states and 263 transitions. [2021-06-05 14:31:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:26,955 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:31:26,956 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:31:26,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:31:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-06-05 14:31:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 206 transitions. [2021-06-05 14:31:26,957 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 206 transitions. Word has length 17 [2021-06-05 14:31:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:26,958 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 206 transitions. [2021-06-05 14:31:26,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 206 transitions. [2021-06-05 14:31:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:26,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:26,958 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:27,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1159 [2021-06-05 14:31:27,161 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:27,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1485565718, now seen corresponding path program 81 times [2021-06-05 14:31:27,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:27,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605950938] [2021-06-05 14:31:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:27,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605950938] [2021-06-05 14:31:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605950938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973891931] [2021-06-05 14:31:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:27,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:31:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:27,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:27,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973891931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:27,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:27,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626747865] [2021-06-05 14:31:27,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:27,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:27,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:27,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:27,411 INFO L87 Difference]: Start difference. First operand 98 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:27,577 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-06-05 14:31:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:27,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:27,578 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:31:27,578 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:31:27,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:31:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2021-06-05 14:31:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.122448979591837) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 208 transitions. [2021-06-05 14:31:27,580 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 208 transitions. Word has length 17 [2021-06-05 14:31:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:27,580 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 208 transitions. [2021-06-05 14:31:27,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 208 transitions. [2021-06-05 14:31:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:27,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:27,580 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:27,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:27,785 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2094947357, now seen corresponding path program 82 times [2021-06-05 14:31:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:27,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529282969] [2021-06-05 14:31:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:27,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:27,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529282969] [2021-06-05 14:31:27,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529282969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239459119] [2021-06-05 14:31:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:27,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239459119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:28,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500068033] [2021-06-05 14:31:28,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:28,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:28,033 INFO L87 Difference]: Start difference. First operand 99 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:28,095 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2021-06-05 14:31:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:28,096 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:31:28,096 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:31:28,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:31:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2021-06-05 14:31:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:28,097 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:28,097 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:28,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:28,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:28,098 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 14:31:28,298 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -454575241, now seen corresponding path program 83 times [2021-06-05 14:31:28,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013495968] [2021-06-05 14:31:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013495968] [2021-06-05 14:31:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013495968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687299382] [2021-06-05 14:31:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687299382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672984026] [2021-06-05 14:31:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:28,587 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:28,779 INFO L93 Difference]: Finished difference Result 108 states and 221 transitions. [2021-06-05 14:31:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:28,779 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:31:28,779 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:31:28,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:31:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-06-05 14:31:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:28,781 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:28,781 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:28,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:28,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:28,782 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,985 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash -521800490, now seen corresponding path program 84 times [2021-06-05 14:31:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008761367] [2021-06-05 14:31:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:29,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008761367] [2021-06-05 14:31:29,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008761367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752649317] [2021-06-05 14:31:29,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752649317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:29,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640456438] [2021-06-05 14:31:29,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:29,252 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:29,353 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2021-06-05 14:31:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:29,354 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:31:29,354 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:31:29,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:31:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-06-05 14:31:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:29,355 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:29,356 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:29,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:29,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:29,356 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:29,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-06-05 14:31:29,565 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1111341005, now seen corresponding path program 85 times [2021-06-05 14:31:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:29,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26886830] [2021-06-05 14:31:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26886830] [2021-06-05 14:31:29,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26886830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127510534] [2021-06-05 14:31:29,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:29,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,862 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-06-05 14:31:29,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:29,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 14:31:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127510534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129434902] [2021-06-05 14:31:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:29,894 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,079 INFO L93 Difference]: Finished difference Result 123 states and 246 transitions. [2021-06-05 14:31:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,080 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:31:30,081 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:31:30,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:31:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-06-05 14:31:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-05 14:31:30,082 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 17 [2021-06-05 14:31:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,083 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-05 14:31:30,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-05 14:31:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:30,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,083 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:30,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-06-05 14:31:30,293 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash 410511092, now seen corresponding path program 86 times [2021-06-05 14:31:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:30,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95295689] [2021-06-05 14:31:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95295689] [2021-06-05 14:31:30,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95295689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923405481] [2021-06-05 14:31:30,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:30,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923405481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:30,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962897] [2021-06-05 14:31:30,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:30,592 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,699 INFO L93 Difference]: Finished difference Result 136 states and 275 transitions. [2021-06-05 14:31:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:30,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,700 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:31:30,700 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 14:31:30,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 14:31:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2021-06-05 14:31:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-05 14:31:30,704 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 17 [2021-06-05 14:31:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,704 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-05 14:31:30,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-05 14:31:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:30,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,704 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:30,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,904 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash -716885001, now seen corresponding path program 87 times [2021-06-05 14:31:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:30,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188894367] [2021-06-05 14:31:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188894367] [2021-06-05 14:31:30,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188894367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618232908] [2021-06-05 14:31:30,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:31,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,174 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-06-05 14:31:31,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:31,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 14:31:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618232908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:31,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:31,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269215031] [2021-06-05 14:31:31,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:31,201 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:31,338 INFO L93 Difference]: Finished difference Result 108 states and 225 transitions. [2021-06-05 14:31:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:31,339 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:31:31,339 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:31:31,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:31:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2021-06-05 14:31:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-06-05 14:31:31,341 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 17 [2021-06-05 14:31:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:31,341 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-06-05 14:31:31,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-06-05 14:31:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:31,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:31,342 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:31,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1211,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,564 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1652543352, now seen corresponding path program 88 times [2021-06-05 14:31:31,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:31,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95257849] [2021-06-05 14:31:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:31,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95257849] [2021-06-05 14:31:31,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95257849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193697433] [2021-06-05 14:31:31,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:31,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193697433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:31,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:31,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810977349] [2021-06-05 14:31:31,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:31,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:31,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:31,833 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:31,928 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-06-05 14:31:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:31,934 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:31:31,934 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:31:31,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:31:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-06-05 14:31:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:31,936 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:31,936 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:31,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:31,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:31,937 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 14:31:32,157 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -95835174, now seen corresponding path program 89 times [2021-06-05 14:31:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171729226] [2021-06-05 14:31:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171729226] [2021-06-05 14:31:32,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171729226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918280543] [2021-06-05 14:31:32,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:32,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918280543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:32,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443876206] [2021-06-05 14:31:32,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:32,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:32,379 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:32,438 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-06-05 14:31:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:32,439 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:32,439 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:31:32,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:31:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2021-06-05 14:31:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:32,441 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:32,441 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:32,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:32,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:32,442 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-05 14:31:32,645 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1334958297, now seen corresponding path program 90 times [2021-06-05 14:31:32,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238383882] [2021-06-05 14:31:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238383882] [2021-06-05 14:31:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238383882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102510430] [2021-06-05 14:31:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:32,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102510430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:32,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117205431] [2021-06-05 14:31:32,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:32,934 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:33,068 INFO L93 Difference]: Finished difference Result 139 states and 277 transitions. [2021-06-05 14:31:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:33,069 INFO L225 Difference]: With dead ends: 139 [2021-06-05 14:31:33,069 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 14:31:33,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 14:31:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2021-06-05 14:31:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 207 transitions. [2021-06-05 14:31:33,071 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 207 transitions. Word has length 17 [2021-06-05 14:31:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:33,071 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 207 transitions. [2021-06-05 14:31:33,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 207 transitions. [2021-06-05 14:31:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:33,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:33,071 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:33,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1236,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:33,285 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash -685375689, now seen corresponding path program 91 times [2021-06-05 14:31:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:33,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949252189] [2021-06-05 14:31:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:33,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949252189] [2021-06-05 14:31:33,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949252189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947764781] [2021-06-05 14:31:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947764781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:33,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:31:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203726844] [2021-06-05 14:31:33,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:31:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:31:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:33,533 INFO L87 Difference]: Start difference. First operand 97 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:33,637 INFO L93 Difference]: Finished difference Result 111 states and 230 transitions. [2021-06-05 14:31:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:33,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:33,638 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:31:33,638 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:31:33,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:31:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-06-05 14:31:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 14:31:33,640 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 17 [2021-06-05 14:31:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:33,640 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 14:31:33,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 14:31:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:33,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:33,641 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:33,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:33,857 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash -999973674, now seen corresponding path program 92 times [2021-06-05 14:31:33,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:33,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388405156] [2021-06-05 14:31:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:33,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:33,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388405156] [2021-06-05 14:31:33,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388405156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373321982] [2021-06-05 14:31:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373321982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:34,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:34,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098929170] [2021-06-05 14:31:34,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:34,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:34,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:34,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:34,142 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:34,314 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-06-05 14:31:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:34,315 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:34,315 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:31:34,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:31:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-06-05 14:31:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:31:34,316 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:31:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:34,316 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:31:34,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:31:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:34,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:34,316 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:34,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 14:31:34,517 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -328009912, now seen corresponding path program 93 times [2021-06-05 14:31:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:34,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953797363] [2021-06-05 14:31:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:34,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953797363] [2021-06-05 14:31:34,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953797363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401201974] [2021-06-05 14:31:34,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:34,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401201974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:34,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774868617] [2021-06-05 14:31:34,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:34,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:34,723 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:34,794 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2021-06-05 14:31:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:34,795 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:31:34,795 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:31:34,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:31:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-06-05 14:31:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:31:34,798 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:31:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:34,798 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:31:34,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:31:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:34,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:34,798 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:35,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 14:31:35,020 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1423896693, now seen corresponding path program 94 times [2021-06-05 14:31:35,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:35,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252693153] [2021-06-05 14:31:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252693153] [2021-06-05 14:31:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252693153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702515036] [2021-06-05 14:31:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:35,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702515036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:35,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:35,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883679604] [2021-06-05 14:31:35,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:35,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:35,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:35,239 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:35,304 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-06-05 14:31:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:35,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:35,305 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:35,305 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:31:35,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:31:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-06-05 14:31:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-06-05 14:31:35,306 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 17 [2021-06-05 14:31:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:35,306 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-06-05 14:31:35,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-06-05 14:31:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:35,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:35,306 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:35,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 14:31:35,507 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1491121942, now seen corresponding path program 95 times [2021-06-05 14:31:35,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:35,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261618544] [2021-06-05 14:31:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:35,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261618544] [2021-06-05 14:31:35,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261618544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599992351] [2021-06-05 14:31:35,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:35,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:35,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599992351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:35,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:35,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105977710] [2021-06-05 14:31:35,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:35,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:35,739 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:35,905 INFO L93 Difference]: Finished difference Result 123 states and 255 transitions. [2021-06-05 14:31:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:35,905 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:31:35,905 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:31:35,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:31:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-06-05 14:31:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:31:35,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:31:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:31:35,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:31:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:35,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:35,908 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,131 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2080662457, now seen corresponding path program 96 times [2021-06-05 14:31:36,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779747822] [2021-06-05 14:31:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779747822] [2021-06-05 14:31:36,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779747822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582163168] [2021-06-05 14:31:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:36,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582163168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:36,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788456974] [2021-06-05 14:31:36,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:36,338 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:36,411 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-06-05 14:31:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:36,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:36,412 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:36,412 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:31:36,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:31:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-06-05 14:31:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2021-06-05 14:31:36,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 17 [2021-06-05 14:31:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:36,414 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2021-06-05 14:31:36,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2021-06-05 14:31:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:36,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:36,414 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1264,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,629 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash -558810360, now seen corresponding path program 97 times [2021-06-05 14:31:36,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84332694] [2021-06-05 14:31:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84332694] [2021-06-05 14:31:36,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84332694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619035778] [2021-06-05 14:31:36,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:36,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:36,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619035778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:36,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:36,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291378784] [2021-06-05 14:31:36,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:36,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:36,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:36,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:36,850 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:37,093 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-06-05 14:31:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:37,094 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:31:37,094 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:31:37,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:31:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-06-05 14:31:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 212 transitions. [2021-06-05 14:31:37,095 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 212 transitions. Word has length 17 [2021-06-05 14:31:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:37,095 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 212 transitions. [2021-06-05 14:31:37,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 212 transitions. [2021-06-05 14:31:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:37,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:37,096 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:37,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1270 [2021-06-05 14:31:37,296 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1686206453, now seen corresponding path program 98 times [2021-06-05 14:31:37,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:37,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317105931] [2021-06-05 14:31:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317105931] [2021-06-05 14:31:37,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317105931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676633579] [2021-06-05 14:31:37,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:37,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676633579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:37,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:37,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69470891] [2021-06-05 14:31:37,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:37,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:37,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:37,528 INFO L87 Difference]: Start difference. First operand 101 states and 212 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:37,595 INFO L93 Difference]: Finished difference Result 103 states and 215 transitions. [2021-06-05 14:31:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:37,595 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:31:37,595 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:37,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 14:31:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-06-05 14:31:37,597 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 17 [2021-06-05 14:31:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:37,597 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-06-05 14:31:37,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-06-05 14:31:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:37,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:37,597 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:37,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-06-05 14:31:37,813 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 59238245, now seen corresponding path program 99 times [2021-06-05 14:31:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:37,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281805618] [2021-06-05 14:31:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281805618] [2021-06-05 14:31:37,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281805618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661248818] [2021-06-05 14:31:37,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:37,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:37,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:37,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661248818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:38,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205456473] [2021-06-05 14:31:38,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:38,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:38,011 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:38,082 INFO L93 Difference]: Finished difference Result 103 states and 210 transitions. [2021-06-05 14:31:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:38,083 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:31:38,083 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:31:38,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:31:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-06-05 14:31:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-06-05 14:31:38,084 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-06-05 14:31:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:38,084 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-06-05 14:31:38,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-06-05 14:31:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:38,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:38,085 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,289 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash -7987004, now seen corresponding path program 100 times [2021-06-05 14:31:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963605107] [2021-06-05 14:31:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963605107] [2021-06-05 14:31:38,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963605107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163317836] [2021-06-05 14:31:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:38,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163317836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:38,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639730186] [2021-06-05 14:31:38,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:38,536 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:38,631 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2021-06-05 14:31:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:38,632 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:38,632 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:31:38,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:31:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2021-06-05 14:31:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 14:31:38,633 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 17 [2021-06-05 14:31:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 14:31:38,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 14:31:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:38,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:38,634 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-06-05 14:31:38,834 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -597527519, now seen corresponding path program 101 times [2021-06-05 14:31:38,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006594069] [2021-06-05 14:31:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006594069] [2021-06-05 14:31:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006594069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835033173] [2021-06-05 14:31:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835033173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:39,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522081281] [2021-06-05 14:31:39,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:39,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:39,045 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:39,120 INFO L93 Difference]: Finished difference Result 118 states and 235 transitions. [2021-06-05 14:31:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:39,121 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:31:39,121 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:31:39,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:31:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-06-05 14:31:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.122448979591837) internal successors, (208), 98 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 208 transitions. [2021-06-05 14:31:39,123 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 208 transitions. Word has length 17 [2021-06-05 14:31:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:39,123 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 208 transitions. [2021-06-05 14:31:39,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 208 transitions. [2021-06-05 14:31:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:39,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:39,123 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:39,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:39,324 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 924324578, now seen corresponding path program 102 times [2021-06-05 14:31:39,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:39,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783787260] [2021-06-05 14:31:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783787260] [2021-06-05 14:31:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783787260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801656305] [2021-06-05 14:31:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:39,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801656305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:39,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726208846] [2021-06-05 14:31:39,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:39,549 INFO L87 Difference]: Start difference. First operand 99 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:39,695 INFO L93 Difference]: Finished difference Result 120 states and 247 transitions. [2021-06-05 14:31:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:39,696 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:39,696 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:31:39,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:31:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-06-05 14:31:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 98 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 207 transitions. [2021-06-05 14:31:39,698 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 207 transitions. Word has length 17 [2021-06-05 14:31:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:39,698 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 207 transitions. [2021-06-05 14:31:39,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 207 transitions. [2021-06-05 14:31:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:39,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:39,698 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:39,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 14:31:39,920 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash -203071515, now seen corresponding path program 103 times [2021-06-05 14:31:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:39,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343853228] [2021-06-05 14:31:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343853228] [2021-06-05 14:31:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343853228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823600960] [2021-06-05 14:31:40,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823600960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:40,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:40,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132315337] [2021-06-05 14:31:40,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:40,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:40,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:40,112 INFO L87 Difference]: Start difference. First operand 99 states and 207 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:40,168 INFO L93 Difference]: Finished difference Result 101 states and 210 transitions. [2021-06-05 14:31:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:40,169 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:31:40,169 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:31:40,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:31:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2021-06-05 14:31:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-06-05 14:31:40,170 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 17 [2021-06-05 14:31:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,171 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-06-05 14:31:40,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-06-05 14:31:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:40,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,171 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-06-05 14:31:40,385 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,385 INFO L82 PathProgramCache]: Analyzing trace with hash 417978312, now seen corresponding path program 104 times [2021-06-05 14:31:40,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950865869] [2021-06-05 14:31:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950865869] [2021-06-05 14:31:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950865869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391861981] [2021-06-05 14:31:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:40,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391861981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:40,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787943972] [2021-06-05 14:31:40,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:40,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:40,618 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:40,680 INFO L93 Difference]: Finished difference Result 115 states and 229 transitions. [2021-06-05 14:31:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:40,681 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:31:40,681 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:31:40,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:31:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-06-05 14:31:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-06-05 14:31:40,682 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 17 [2021-06-05 14:31:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,682 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-06-05 14:31:40,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-06-05 14:31:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:40,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,683 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1306,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,883 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash -171562203, now seen corresponding path program 105 times [2021-06-05 14:31:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706625117] [2021-06-05 14:31:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706625117] [2021-06-05 14:31:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706625117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719373384] [2021-06-05 14:31:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719373384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:41,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347223615] [2021-06-05 14:31:41,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:41,144 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:41,256 INFO L93 Difference]: Finished difference Result 103 states and 213 transitions. [2021-06-05 14:31:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:41,256 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:31:41,257 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:41,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2021-06-05 14:31:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.10989010989011) internal successors, (192), 91 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 192 transitions. [2021-06-05 14:31:41,258 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 192 transitions. Word has length 17 [2021-06-05 14:31:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:41,258 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 192 transitions. [2021-06-05 14:31:41,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 192 transitions. [2021-06-05 14:31:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:41,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:41,258 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:41,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-05 14:31:41,458 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash -486160188, now seen corresponding path program 106 times [2021-06-05 14:31:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:41,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062279726] [2021-06-05 14:31:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:41,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062279726] [2021-06-05 14:31:41,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062279726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967804625] [2021-06-05 14:31:41,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967804625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912734165] [2021-06-05 14:31:41,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:41,654 INFO L87 Difference]: Start difference. First operand 92 states and 192 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:41,728 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-06-05 14:31:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:41,729 INFO L225 Difference]: With dead ends: 99 [2021-06-05 14:31:41,729 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:31:41,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:31:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-06-05 14:31:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 14:31:41,734 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 14:31:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:41,734 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 14:31:41,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 14:31:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:41,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:41,734 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:41,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1313,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,948 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1208218933, now seen corresponding path program 107 times [2021-06-05 14:31:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:41,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841592107] [2021-06-05 14:31:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841592107] [2021-06-05 14:31:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841592107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523452678] [2021-06-05 14:31:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:42,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523452678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:42,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:42,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382123771] [2021-06-05 14:31:42,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:42,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:42,242 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:42,468 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2021-06-05 14:31:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:42,469 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:31:42,469 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:31:42,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:31:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-06-05 14:31:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:42,470 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:42,470 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:42,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:42,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:42,470 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:42,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1318 [2021-06-05 14:31:42,671 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1275444182, now seen corresponding path program 108 times [2021-06-05 14:31:42,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:42,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515489428] [2021-06-05 14:31:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:42,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515489428] [2021-06-05 14:31:42,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515489428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193735996] [2021-06-05 14:31:42,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:42,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:42,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193735996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:42,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:42,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772816105] [2021-06-05 14:31:42,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:42,918 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:43,005 INFO L93 Difference]: Finished difference Result 103 states and 212 transitions. [2021-06-05 14:31:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:43,005 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:31:43,005 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:43,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2021-06-05 14:31:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:43,006 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:43,007 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:43,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:43,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:43,007 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:43,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1329,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,207 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2079910332, now seen corresponding path program 109 times [2021-06-05 14:31:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463519827] [2021-06-05 14:31:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463519827] [2021-06-05 14:31:43,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463519827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727067512] [2021-06-05 14:31:43,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727067512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:43,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:43,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819833346] [2021-06-05 14:31:43,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:43,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:43,492 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:43,601 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2021-06-05 14:31:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:43,602 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:31:43,602 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:31:43,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:31:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-06-05 14:31:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:43,604 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:43,604 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:43,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:43,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:43,604 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:43,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1332 [2021-06-05 14:31:43,825 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1470528693, now seen corresponding path program 110 times [2021-06-05 14:31:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287798706] [2021-06-05 14:31:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:43,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287798706] [2021-06-05 14:31:43,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287798706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953421604] [2021-06-05 14:31:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:43,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:44,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:44,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:44,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:44,100 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-06-05 14:31:44,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:44,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 14:31:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953421604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:44,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:44,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579728418] [2021-06-05 14:31:44,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:44,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:44,127 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,269 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2021-06-05 14:31:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,269 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:31:44,269 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:31:44,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:31:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2021-06-05 14:31:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-06-05 14:31:44,270 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-06-05 14:31:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,270 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-06-05 14:31:44,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-06-05 14:31:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:44,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,271 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:44,471 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1923636333, now seen corresponding path program 111 times [2021-06-05 14:31:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:44,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583632067] [2021-06-05 14:31:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583632067] [2021-06-05 14:31:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583632067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224463018] [2021-06-05 14:31:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:44,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224463018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:44,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310860306] [2021-06-05 14:31:44,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:44,726 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,885 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-06-05 14:31:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,885 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:44,886 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:31:44,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:31:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-06-05 14:31:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:44,887 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,887 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:44,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:44,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,888 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:45,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,108 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash -849478866, now seen corresponding path program 112 times [2021-06-05 14:31:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939594595] [2021-06-05 14:31:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939594595] [2021-06-05 14:31:45,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939594595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116099602] [2021-06-05 14:31:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:45,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116099602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:45,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:45,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363516867] [2021-06-05 14:31:45,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:45,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:45,327 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:45,390 INFO L93 Difference]: Finished difference Result 119 states and 239 transitions. [2021-06-05 14:31:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:45,391 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:31:45,391 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:31:45,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:31:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-06-05 14:31:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:45,392 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:45,393 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:45,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:45,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:45,393 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:45,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1367,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,605 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1976874959, now seen corresponding path program 113 times [2021-06-05 14:31:45,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:45,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575603953] [2021-06-05 14:31:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575603953] [2021-06-05 14:31:45,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575603953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603627904] [2021-06-05 14:31:45,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:45,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603627904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:45,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:45,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158761262] [2021-06-05 14:31:45,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:45,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:45,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:45,838 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,004 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2021-06-05 14:31:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,004 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:31:46,004 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:31:46,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:31:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2021-06-05 14:31:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.125) internal successors, (204), 96 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 204 transitions. [2021-06-05 14:31:46,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 204 transitions. Word has length 17 [2021-06-05 14:31:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,006 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 204 transitions. [2021-06-05 14:31:46,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 204 transitions. [2021-06-05 14:31:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:46,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,007 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:46,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,225 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash 392553394, now seen corresponding path program 114 times [2021-06-05 14:31:46,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:46,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234039085] [2021-06-05 14:31:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:46,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234039085] [2021-06-05 14:31:46,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234039085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801010154] [2021-06-05 14:31:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801010154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020659710] [2021-06-05 14:31:46,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:46,431 INFO L87 Difference]: Start difference. First operand 97 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,525 INFO L93 Difference]: Finished difference Result 121 states and 240 transitions. [2021-06-05 14:31:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,525 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:31:46,525 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:31:46,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:31:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-06-05 14:31:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 95 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 201 transitions. [2021-06-05 14:31:46,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 201 transitions. Word has length 17 [2021-06-05 14:31:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,527 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 201 transitions. [2021-06-05 14:31:46,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 201 transitions. [2021-06-05 14:31:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:46,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,527 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:46,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1377,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,728 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1439019381, now seen corresponding path program 115 times [2021-06-05 14:31:46,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:46,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912780910] [2021-06-05 14:31:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912780910] [2021-06-05 14:31:46,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912780910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919147703] [2021-06-05 14:31:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919147703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:46,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:46,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650280727] [2021-06-05 14:31:46,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:46,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:46,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:46,964 INFO L87 Difference]: Start difference. First operand 96 states and 201 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:47,084 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-06-05 14:31:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:47,084 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:47,084 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:31:47,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:31:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2021-06-05 14:31:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:31:47,085 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:31:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:47,085 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:31:47,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:31:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:47,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:47,086 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:47,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1381,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,295 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:47,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1753617366, now seen corresponding path program 116 times [2021-06-05 14:31:47,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:47,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641371883] [2021-06-05 14:31:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641371883] [2021-06-05 14:31:47,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641371883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582867296] [2021-06-05 14:31:47,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582867296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:47,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789437456] [2021-06-05 14:31:47,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:47,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:47,560 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:47,645 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 14:31:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:47,647 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:31:47,647 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:31:47,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:31:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-06-05 14:31:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-06-05 14:31:47,653 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-06-05 14:31:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:47,653 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-06-05 14:31:47,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-06-05 14:31:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:47,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:47,654 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:47,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1383 [2021-06-05 14:31:47,868 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash -888196025, now seen corresponding path program 117 times [2021-06-05 14:31:47,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:47,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397539762] [2021-06-05 14:31:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397539762] [2021-06-05 14:31:47,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397539762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159317485] [2021-06-05 14:31:47,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:31:47,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159317485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559381380] [2021-06-05 14:31:48,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:48,081 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:48,153 INFO L93 Difference]: Finished difference Result 130 states and 257 transitions. [2021-06-05 14:31:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:48,153 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:31:48,153 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:31:48,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:31:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-06-05 14:31:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 14:31:48,155 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 14:31:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:48,155 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 14:31:48,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 14:31:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:48,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:48,155 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:48,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 14:31:48,356 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 633656072, now seen corresponding path program 118 times [2021-06-05 14:31:48,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:48,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063926722] [2021-06-05 14:31:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063926722] [2021-06-05 14:31:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063926722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189087160] [2021-06-05 14:31:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:48,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,643 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 14:31:48,643 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:48,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:48,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 14:31:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189087160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:48,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914650499] [2021-06-05 14:31:48,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:48,666 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:48,721 INFO L93 Difference]: Finished difference Result 122 states and 246 transitions. [2021-06-05 14:31:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:48,721 INFO L225 Difference]: With dead ends: 122 [2021-06-05 14:31:48,721 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:31:48,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:31:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2021-06-05 14:31:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 14:31:48,723 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 14:31:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:48,723 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 14:31:48,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 14:31:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:48,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:48,723 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1392,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,925 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -493740021, now seen corresponding path program 119 times [2021-06-05 14:31:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188223274] [2021-06-05 14:31:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188223274] [2021-06-05 14:31:49,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188223274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427157031] [2021-06-05 14:31:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:49,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427157031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:49,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085696202] [2021-06-05 14:31:49,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:49,138 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,300 INFO L93 Difference]: Finished difference Result 133 states and 266 transitions. [2021-06-05 14:31:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,300 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:31:49,300 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:31:49,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:31:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-06-05 14:31:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1443298969072164) internal successors, (208), 97 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 208 transitions. [2021-06-05 14:31:49,302 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 208 transitions. Word has length 17 [2021-06-05 14:31:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,302 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 208 transitions. [2021-06-05 14:31:49,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 208 transitions. [2021-06-05 14:31:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:49,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,302 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:49,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1406 [2021-06-05 14:31:49,519 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1875688332, now seen corresponding path program 120 times [2021-06-05 14:31:49,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:49,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089859681] [2021-06-05 14:31:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089859681] [2021-06-05 14:31:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089859681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861181281] [2021-06-05 14:31:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:49,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:49,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,830 INFO L628 ElimStorePlain]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 14:31:49,830 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:31:49,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:49,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:12 [2021-06-05 14:31:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861181281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:49,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:49,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261241423] [2021-06-05 14:31:49,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:49,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:49,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:49,854 INFO L87 Difference]: Start difference. First operand 98 states and 208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,945 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-06-05 14:31:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,945 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:31:49,945 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:31:49,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:31:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-06-05 14:31:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 14:31:49,947 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 14:31:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,947 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 14:31:49,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 14:31:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:49,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,947 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:50,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1411,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,148 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 44115557, now seen corresponding path program 121 times [2021-06-05 14:31:50,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:50,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961841083] [2021-06-05 14:31:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961841083] [2021-06-05 14:31:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961841083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564116695] [2021-06-05 14:31:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564116695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:50,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:31:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983106447] [2021-06-05 14:31:50,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:31:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:31:50,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:31:50,378 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:50,450 INFO L93 Difference]: Finished difference Result 117 states and 241 transitions. [2021-06-05 14:31:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:50,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:50,451 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:31:50,451 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:31:50,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:31:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-06-05 14:31:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 96 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 205 transitions. [2021-06-05 14:31:50,452 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 205 transitions. Word has length 17 [2021-06-05 14:31:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:50,452 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 205 transitions. [2021-06-05 14:31:50,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 205 transitions. [2021-06-05 14:31:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:50,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:50,452 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:50,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 14:31:50,653 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash -270482428, now seen corresponding path program 122 times [2021-06-05 14:31:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:50,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238477576] [2021-06-05 14:31:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238477576] [2021-06-05 14:31:50,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238477576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274355804] [2021-06-05 14:31:50,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:50,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:51,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274355804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:51,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191420729] [2021-06-05 14:31:51,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:51,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:51,109 INFO L87 Difference]: Start difference. First operand 97 states and 205 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:51,404 INFO L93 Difference]: Finished difference Result 108 states and 221 transitions. [2021-06-05 14:31:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:51,405 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:31:51,405 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:31:51,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:31:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-06-05 14:31:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-06-05 14:31:51,406 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2021-06-05 14:31:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:51,406 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-06-05 14:31:51,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-06-05 14:31:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:51,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:51,407 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:51,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:51,607 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -462230709, now seen corresponding path program 123 times [2021-06-05 14:31:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:51,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404548735] [2021-06-05 14:31:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:51,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:51,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404548735] [2021-06-05 14:31:51,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404548735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219897482] [2021-06-05 14:31:51,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:51,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219897482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:51,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:31:51,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116174585] [2021-06-05 14:31:51,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:31:51,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:31:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:51,755 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:51,800 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2021-06-05 14:31:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:51,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:51,800 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:31:51,800 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:31:51,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:31:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-06-05 14:31:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 190 transitions. [2021-06-05 14:31:51,801 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 190 transitions. Word has length 17 [2021-06-05 14:31:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:51,802 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 190 transitions. [2021-06-05 14:31:51,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 190 transitions. [2021-06-05 14:31:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:51,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:51,802 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-05 14:31:52,002 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1917700748, now seen corresponding path program 124 times [2021-06-05 14:31:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876615983] [2021-06-05 14:31:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876615983] [2021-06-05 14:31:52,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876615983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843918184] [2021-06-05 14:31:52,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843918184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375651193] [2021-06-05 14:31:52,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:52,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:52,174 INFO L87 Difference]: Start difference. First operand 91 states and 190 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:52,241 INFO L93 Difference]: Finished difference Result 100 states and 203 transitions. [2021-06-05 14:31:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:52,241 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:31:52,241 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:31:52,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:31:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-06-05 14:31:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:31:52,243 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:31:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:52,243 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:31:52,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:31:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:52,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:52,243 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 14:31:52,457 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1589612134, now seen corresponding path program 125 times [2021-06-05 14:31:52,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609675686] [2021-06-05 14:31:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609675686] [2021-06-05 14:31:52,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609675686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828098928] [2021-06-05 14:31:52,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828098928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:52,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253449799] [2021-06-05 14:31:52,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:52,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:52,630 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:52,698 INFO L93 Difference]: Finished difference Result 103 states and 213 transitions. [2021-06-05 14:31:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:52,698 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:31:52,698 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:52,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-06-05 14:31:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:31:52,700 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:31:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:52,700 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:31:52,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:31:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:52,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:52,700 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-06-05 14:31:52,919 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1542243132, now seen corresponding path program 126 times [2021-06-05 14:31:52,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051241695] [2021-06-05 14:31:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051241695] [2021-06-05 14:31:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051241695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183159986] [2021-06-05 14:31:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:53,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183159986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:53,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:31:53,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128685792] [2021-06-05 14:31:53,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:31:53,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:31:53,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:53,101 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,146 INFO L93 Difference]: Finished difference Result 115 states and 237 transitions. [2021-06-05 14:31:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,147 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:31:53,147 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:31:53,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:31:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-06-05 14:31:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:31:53,148 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:31:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:31:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:31:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:53,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,148 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-06-05 14:31:53,349 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1820412582, now seen corresponding path program 127 times [2021-06-05 14:31:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596003733] [2021-06-05 14:31:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596003733] [2021-06-05 14:31:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596003733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646278193] [2021-06-05 14:31:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:53,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:53,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:12 [2021-06-05 14:31:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646278193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:53,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:53,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146917524] [2021-06-05 14:31:53,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:53,601 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,721 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2021-06-05 14:31:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,721 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:31:53,721 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:31:53,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:31:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-06-05 14:31:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.098901098901099) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-06-05 14:31:53,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 17 [2021-06-05 14:31:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,722 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-06-05 14:31:53,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-06-05 14:31:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:53,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,723 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,923 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1347158621, now seen corresponding path program 128 times [2021-06-05 14:31:53,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817273961] [2021-06-05 14:31:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817273961] [2021-06-05 14:31:54,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817273961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559757659] [2021-06-05 14:31:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:54,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559757659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:31:54,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307143767] [2021-06-05 14:31:54,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:31:54,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:31:54,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:54,153 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:54,222 INFO L93 Difference]: Finished difference Result 95 states and 197 transitions. [2021-06-05 14:31:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:54,223 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:31:54,223 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:31:54,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:31:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-06-05 14:31:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.102272727272727) internal successors, (185), 88 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 185 transitions. [2021-06-05 14:31:54,224 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 185 transitions. Word has length 17 [2021-06-05 14:31:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:54,224 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 185 transitions. [2021-06-05 14:31:54,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 185 transitions. [2021-06-05 14:31:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:54,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:54,224 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:54,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1461,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,424 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1202363977, now seen corresponding path program 129 times [2021-06-05 14:31:54,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:54,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310557382] [2021-06-05 14:31:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310557382] [2021-06-05 14:31:54,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310557382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498751476] [2021-06-05 14:31:54,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498751476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:54,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981336279] [2021-06-05 14:31:54,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:54,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:54,636 INFO L87 Difference]: Start difference. First operand 89 states and 185 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:54,703 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2021-06-05 14:31:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:54,704 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:31:54,704 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:31:54,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:31:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-06-05 14:31:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-06-05 14:31:54,706 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-06-05 14:31:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:54,706 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-06-05 14:31:54,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-06-05 14:31:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:54,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:54,706 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:54,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,907 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1269589226, now seen corresponding path program 130 times [2021-06-05 14:31:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:54,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763208005] [2021-06-05 14:31:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763208005] [2021-06-05 14:31:54,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763208005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546778409] [2021-06-05 14:31:54,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546778409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:55,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:55,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818879576] [2021-06-05 14:31:55,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:55,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:55,092 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:55,139 INFO L93 Difference]: Finished difference Result 97 states and 200 transitions. [2021-06-05 14:31:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:55,140 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:31:55,140 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:31:55,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:31:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-06-05 14:31:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-06-05 14:31:55,141 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-06-05 14:31:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:55,141 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-06-05 14:31:55,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-06-05 14:31:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:55,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:55,141 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-05 14:31:55,357 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash -337277644, now seen corresponding path program 131 times [2021-06-05 14:31:55,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439989212] [2021-06-05 14:31:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439989212] [2021-06-05 14:31:55,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439989212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582163768] [2021-06-05 14:31:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:55,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582163768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:55,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:55,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365167979] [2021-06-05 14:31:55,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:55,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:55,540 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:55,592 INFO L93 Difference]: Finished difference Result 105 states and 216 transitions. [2021-06-05 14:31:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:55,592 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:31:55,592 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:31:55,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:31:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-06-05 14:31:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 184 transitions. [2021-06-05 14:31:55,593 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 184 transitions. Word has length 17 [2021-06-05 14:31:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:55,594 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 184 transitions. [2021-06-05 14:31:55,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 184 transitions. [2021-06-05 14:31:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:55,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:55,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-06-05 14:31:55,794 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1093515827, now seen corresponding path program 132 times [2021-06-05 14:31:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279692332] [2021-06-05 14:31:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:55,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:55,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279692332] [2021-06-05 14:31:55,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279692332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171411046] [2021-06-05 14:31:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171411046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:56,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964440732] [2021-06-05 14:31:56,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:56,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:56,003 INFO L87 Difference]: Start difference. First operand 89 states and 184 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:56,067 INFO L93 Difference]: Finished difference Result 92 states and 188 transitions. [2021-06-05 14:31:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:56,068 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:31:56,068 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:31:56,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:31:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-06-05 14:31:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 84 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 172 transitions. [2021-06-05 14:31:56,069 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 172 transitions. Word has length 17 [2021-06-05 14:31:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:56,069 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 172 transitions. [2021-06-05 14:31:56,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 172 transitions. [2021-06-05 14:31:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:56,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:56,069 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,270 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1929491289, now seen corresponding path program 133 times [2021-06-05 14:31:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911634144] [2021-06-05 14:31:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911634144] [2021-06-05 14:31:56,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911634144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428611441] [2021-06-05 14:31:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428611441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:56,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487992377] [2021-06-05 14:31:56,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:56,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:56,493 INFO L87 Difference]: Start difference. First operand 85 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:56,569 INFO L93 Difference]: Finished difference Result 112 states and 217 transitions. [2021-06-05 14:31:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:56,570 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:31:56,570 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:31:56,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:31:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2021-06-05 14:31:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:56,572 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:56,572 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:56,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:56,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:56,572 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:56,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1490 [2021-06-05 14:31:56,795 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash -843623910, now seen corresponding path program 134 times [2021-06-05 14:31:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:56,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023828238] [2021-06-05 14:31:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:56,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023828238] [2021-06-05 14:31:56,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023828238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460239126] [2021-06-05 14:31:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460239126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:56,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713534597] [2021-06-05 14:31:56,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:56,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:56,994 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:57,066 INFO L93 Difference]: Finished difference Result 111 states and 219 transitions. [2021-06-05 14:31:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:57,067 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:31:57,067 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:31:57,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:31:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2021-06-05 14:31:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:57,068 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:57,068 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:57,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:57,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:57,068 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:57,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-06-05 14:31:57,269 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1971020003, now seen corresponding path program 135 times [2021-06-05 14:31:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:57,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587673901] [2021-06-05 14:31:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587673901] [2021-06-05 14:31:57,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587673901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155082031] [2021-06-05 14:31:57,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:57,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:31:57,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:57,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:57,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:12 [2021-06-05 14:31:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155082031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:57,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:57,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935963034] [2021-06-05 14:31:57,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:57,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:57,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:57,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:57,486 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:57,563 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-06-05 14:31:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:57,564 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:31:57,564 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:31:57,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:31:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-06-05 14:31:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.087912087912088) internal successors, (190), 91 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 190 transitions. [2021-06-05 14:31:57,565 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 190 transitions. Word has length 17 [2021-06-05 14:31:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 190 transitions. [2021-06-05 14:31:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 190 transitions. [2021-06-05 14:31:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:57,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:57,566 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:57,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-06-05 14:31:57,766 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash 398408350, now seen corresponding path program 136 times [2021-06-05 14:31:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:57,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317573019] [2021-06-05 14:31:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317573019] [2021-06-05 14:31:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317573019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345202429] [2021-06-05 14:31:57,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345202429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:57,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75652371] [2021-06-05 14:31:57,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:57,961 INFO L87 Difference]: Start difference. First operand 92 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,026 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 14:31:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,026 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:31:58,026 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:31:58,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:31:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:31:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-06-05 14:31:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 187 transitions. [2021-06-05 14:31:58,028 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 187 transitions. Word has length 17 [2021-06-05 14:31:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,028 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 187 transitions. [2021-06-05 14:31:58,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 187 transitions. [2021-06-05 14:31:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:58,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,028 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:58,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-06-05 14:31:58,229 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1433164425, now seen corresponding path program 137 times [2021-06-05 14:31:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:58,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298928734] [2021-06-05 14:31:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:58,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298928734] [2021-06-05 14:31:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298928734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667641430] [2021-06-05 14:31:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:58,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667641430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:31:58,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652908256] [2021-06-05 14:31:58,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:31:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:31:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:58,444 INFO L87 Difference]: Start difference. First operand 91 states and 187 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,497 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2021-06-05 14:31:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,497 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:31:58,497 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:31:58,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:31:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-06-05 14:31:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-06-05 14:31:58,499 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-06-05 14:31:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,499 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-06-05 14:31:58,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-06-05 14:31:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:58,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,499 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:58,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,699 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762410, now seen corresponding path program 138 times [2021-06-05 14:31:58,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:58,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193729510] [2021-06-05 14:31:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193729510] [2021-06-05 14:31:58,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193729510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756305907] [2021-06-05 14:31:58,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756305907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:31:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841319721] [2021-06-05 14:31:58,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:31:58,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:31:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:31:58,894 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,982 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 14:31:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,983 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:31:58,983 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:31:58,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:31:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-06-05 14:31:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:31:58,984 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:31:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,984 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:31:58,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:31:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:58,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,984 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:59,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,205 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1757920892, now seen corresponding path program 139 times [2021-06-05 14:31:59,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:59,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467200075] [2021-06-05 14:31:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467200075] [2021-06-05 14:31:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467200075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422756710] [2021-06-05 14:31:59,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422756710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:31:59,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601359590] [2021-06-05 14:31:59,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:31:59,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:31:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:59,376 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:59,428 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2021-06-05 14:31:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:59,429 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:31:59,429 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:31:59,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:31:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:31:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-06-05 14:31:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 84 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 172 transitions. [2021-06-05 14:31:59,430 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 172 transitions. Word has length 17 [2021-06-05 14:31:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:59,430 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 172 transitions. [2021-06-05 14:31:59,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 172 transitions. [2021-06-05 14:31:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:59,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:59,430 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:59,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1523 [2021-06-05 14:31:59,631 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1168380377, now seen corresponding path program 140 times [2021-06-05 14:31:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:59,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66872259] [2021-06-05 14:31:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66872259] [2021-06-05 14:31:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66872259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867572791] [2021-06-05 14:31:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:59,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:31:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867572791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:31:59,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928419511] [2021-06-05 14:31:59,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:31:59,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:31:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:31:59,830 INFO L87 Difference]: Start difference. First operand 85 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:59,990 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 14:31:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:31:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:59,991 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:31:59,991 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:31:59,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:31:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:31:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2021-06-05 14:31:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-06-05 14:31:59,992 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 17 [2021-06-05 14:31:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:59,992 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-06-05 14:31:59,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-06-05 14:31:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:31:59,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:59,992 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-06-05 14:32:00,193 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1604734822, now seen corresponding path program 141 times [2021-06-05 14:32:00,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315178343] [2021-06-05 14:32:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315178343] [2021-06-05 14:32:00,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315178343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132159795] [2021-06-05 14:32:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:32:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132159795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:00,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608133458] [2021-06-05 14:32:00,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:00,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:00,370 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:00,438 INFO L93 Difference]: Finished difference Result 119 states and 234 transitions. [2021-06-05 14:32:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:00,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:00,438 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:32:00,438 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:32:00,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:32:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-06-05 14:32:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-06-05 14:32:00,440 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 17 [2021-06-05 14:32:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:00,440 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-06-05 14:32:00,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-06-05 14:32:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:00,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,441 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-06-05 14:32:00,663 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1562836381, now seen corresponding path program 142 times [2021-06-05 14:32:00,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995649979] [2021-06-05 14:32:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995649979] [2021-06-05 14:32:00,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995649979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346785916] [2021-06-05 14:32:00,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:00,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346785916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771204138] [2021-06-05 14:32:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:00,879 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:00,945 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2021-06-05 14:32:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:00,946 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:32:00,946 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:32:00,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:32:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-06-05 14:32:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-06-05 14:32:00,947 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-06-05 14:32:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:00,947 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-06-05 14:32:00,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-06-05 14:32:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:00,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,947 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:01,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1536 [2021-06-05 14:32:01,148 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -362702562, now seen corresponding path program 143 times [2021-06-05 14:32:01,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:01,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964882219] [2021-06-05 14:32:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964882219] [2021-06-05 14:32:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964882219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939291876] [2021-06-05 14:32:01,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939291876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:01,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272450535] [2021-06-05 14:32:01,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:01,329 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:01,391 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 14:32:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:01,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:01,392 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:32:01,392 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:32:01,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:32:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-06-05 14:32:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 14:32:01,393 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 17 [2021-06-05 14:32:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:01,393 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 14:32:01,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 14:32:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:01,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:01,393 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:01,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-06-05 14:32:01,594 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:01,594 INFO L82 PathProgramCache]: Analyzing trace with hash 662034111, now seen corresponding path program 144 times [2021-06-05 14:32:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:01,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705135954] [2021-06-05 14:32:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:01,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705135954] [2021-06-05 14:32:01,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705135954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864417454] [2021-06-05 14:32:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864417454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:01,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:01,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307634928] [2021-06-05 14:32:01,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:01,775 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:01,847 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 14:32:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:01,847 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:32:01,847 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:32:01,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:32:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2021-06-05 14:32:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-06-05 14:32:01,849 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-06-05 14:32:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-06-05 14:32:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-06-05 14:32:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:01,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:01,849 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1549,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,049 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2111081088, now seen corresponding path program 145 times [2021-06-05 14:32:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100572179] [2021-06-05 14:32:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100572179] [2021-06-05 14:32:02,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100572179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145349349] [2021-06-05 14:32:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145349349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:02,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310461277] [2021-06-05 14:32:02,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:02,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:02,247 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,311 INFO L93 Difference]: Finished difference Result 110 states and 217 transitions. [2021-06-05 14:32:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:02,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:02,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,312 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:32:02,312 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:32:02,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:32:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-06-05 14:32:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-06-05 14:32:02,313 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-06-05 14:32:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,313 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-06-05 14:32:02,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-06-05 14:32:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:02,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,313 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1554,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,514 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1056490115, now seen corresponding path program 146 times [2021-06-05 14:32:02,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590816012] [2021-06-05 14:32:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590816012] [2021-06-05 14:32:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590816012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066892581] [2021-06-05 14:32:02,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:02,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066892581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:02,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324697883] [2021-06-05 14:32:02,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:02,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:02,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:02,686 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,753 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 14:32:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,754 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:32:02,754 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:32:02,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:32:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-06-05 14:32:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.088888888888889) internal successors, (188), 90 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 188 transitions. [2021-06-05 14:32:02,755 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 188 transitions. Word has length 17 [2021-06-05 14:32:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,755 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 188 transitions. [2021-06-05 14:32:02,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 188 transitions. [2021-06-05 14:32:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:02,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,756 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,956 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash -869048828, now seen corresponding path program 147 times [2021-06-05 14:32:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975101955] [2021-06-05 14:32:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975101955] [2021-06-05 14:32:03,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975101955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329552478] [2021-06-05 14:32:03,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:03,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329552478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26560527] [2021-06-05 14:32:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:03,187 INFO L87 Difference]: Start difference. First operand 91 states and 188 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:03,269 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-06-05 14:32:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:03,270 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:32:03,270 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:32:03,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:32:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-06-05 14:32:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-06-05 14:32:03,272 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 17 [2021-06-05 14:32:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:03,272 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-06-05 14:32:03,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-06-05 14:32:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:03,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:03,272 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:03,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1566 [2021-06-05 14:32:03,493 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1594345693, now seen corresponding path program 148 times [2021-06-05 14:32:03,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:03,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188599906] [2021-06-05 14:32:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188599906] [2021-06-05 14:32:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188599906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838679859] [2021-06-05 14:32:03,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838679859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:03,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58841897] [2021-06-05 14:32:03,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:03,684 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:03,766 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2021-06-05 14:32:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:03,767 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:32:03,767 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:32:03,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:32:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-06-05 14:32:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 14:32:03,769 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 17 [2021-06-05 14:32:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:03,769 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 14:32:03,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 14:32:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:03,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:03,769 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:03,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-06-05 14:32:03,985 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1279747708, now seen corresponding path program 149 times [2021-06-05 14:32:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:03,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999295290] [2021-06-05 14:32:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999295290] [2021-06-05 14:32:04,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999295290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854739552] [2021-06-05 14:32:04,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854739552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:04,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282206767] [2021-06-05 14:32:04,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:04,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:04,216 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:04,302 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 14:32:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:04,303 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:32:04,303 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:32:04,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:32:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-06-05 14:32:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:32:04,304 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:32:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:04,304 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:32:04,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:32:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:04,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:04,305 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-06-05 14:32:04,525 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2145169049, now seen corresponding path program 150 times [2021-06-05 14:32:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22395] [2021-06-05 14:32:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22395] [2021-06-05 14:32:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104802398] [2021-06-05 14:32:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104802398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:04,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178993340] [2021-06-05 14:32:04,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:04,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:04,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:04,703 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:04,781 INFO L93 Difference]: Finished difference Result 115 states and 222 transitions. [2021-06-05 14:32:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:04,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:04,781 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:32:04,781 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:32:04,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:32:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-06-05 14:32:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:32:04,782 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:32:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:04,782 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:32:04,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:32:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:04,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:04,783 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:04,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,999 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash -627946150, now seen corresponding path program 151 times [2021-06-05 14:32:04,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:04,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900905113] [2021-06-05 14:32:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:05,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900905113] [2021-06-05 14:32:05,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900905113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308437953] [2021-06-05 14:32:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308437953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:05,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586301795] [2021-06-05 14:32:05,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:05,223 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,301 INFO L93 Difference]: Finished difference Result 112 states and 221 transitions. [2021-06-05 14:32:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:05,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,302 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:32:05,302 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:32:05,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:32:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-06-05 14:32:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:32:05,303 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:32:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,303 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:32:05,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:32:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:05,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,304 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:05,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1585,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,504 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1755342243, now seen corresponding path program 152 times [2021-06-05 14:32:05,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:05,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774845127] [2021-06-05 14:32:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774845127] [2021-06-05 14:32:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774845127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718459] [2021-06-05 14:32:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:05,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:05,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:05,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:05,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714346569] [2021-06-05 14:32:05,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:05,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:05,679 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,750 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-06-05 14:32:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:05,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,750 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:32:05,750 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:32:05,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:32:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-06-05 14:32:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 189 transitions. [2021-06-05 14:32:05,752 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 189 transitions. Word has length 17 [2021-06-05 14:32:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,752 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 189 transitions. [2021-06-05 14:32:05,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 189 transitions. [2021-06-05 14:32:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:05,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,752 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1591,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,952 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 614086110, now seen corresponding path program 153 times [2021-06-05 14:32:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880077788] [2021-06-05 14:32:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880077788] [2021-06-05 14:32:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880077788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311961797] [2021-06-05 14:32:06,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:06,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311961797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137282991] [2021-06-05 14:32:06,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:06,171 INFO L87 Difference]: Start difference. First operand 91 states and 189 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:06,266 INFO L93 Difference]: Finished difference Result 114 states and 222 transitions. [2021-06-05 14:32:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:06,266 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:32:06,266 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:32:06,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:32:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-06-05 14:32:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-06-05 14:32:06,267 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-06-05 14:32:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:06,267 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-06-05 14:32:06,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-06-05 14:32:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:06,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:06,268 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:06,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1597,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,468 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1217486665, now seen corresponding path program 154 times [2021-06-05 14:32:06,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:06,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204961229] [2021-06-05 14:32:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:06,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204961229] [2021-06-05 14:32:06,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204961229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077427813] [2021-06-05 14:32:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077427813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494386243] [2021-06-05 14:32:06,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:06,659 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:06,721 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2021-06-05 14:32:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:06,721 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:32:06,721 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:32:06,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:32:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2021-06-05 14:32:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 186 transitions. [2021-06-05 14:32:06,722 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 186 transitions. Word has length 17 [2021-06-05 14:32:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:06,722 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 186 transitions. [2021-06-05 14:32:06,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 186 transitions. [2021-06-05 14:32:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:06,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:06,723 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:06,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1603,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,923 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1532084650, now seen corresponding path program 155 times [2021-06-05 14:32:06,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355411782] [2021-06-05 14:32:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355411782] [2021-06-05 14:32:07,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355411782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531675996] [2021-06-05 14:32:07,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:07,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:07,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531675996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:07,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012895020] [2021-06-05 14:32:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:07,141 INFO L87 Difference]: Start difference. First operand 90 states and 186 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,242 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 14:32:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,242 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:32:07,242 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:32:07,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:32:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-06-05 14:32:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 183 transitions. [2021-06-05 14:32:07,244 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 183 transitions. Word has length 17 [2021-06-05 14:32:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,244 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 183 transitions. [2021-06-05 14:32:07,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 183 transitions. [2021-06-05 14:32:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:07,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,245 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,455 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1723832931, now seen corresponding path program 156 times [2021-06-05 14:32:07,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132843768] [2021-06-05 14:32:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132843768] [2021-06-05 14:32:07,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132843768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711233432] [2021-06-05 14:32:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711233432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:07,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:07,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045131119] [2021-06-05 14:32:07,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:07,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:07,609 INFO L87 Difference]: Start difference. First operand 89 states and 183 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,670 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2021-06-05 14:32:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,671 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:32:07,671 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:32:07,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:32:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2021-06-05 14:32:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:32:07,672 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:32:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,672 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:32:07,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:32:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:07,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,672 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1610 [2021-06-05 14:32:07,873 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 656098526, now seen corresponding path program 157 times [2021-06-05 14:32:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312654240] [2021-06-05 14:32:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312654240] [2021-06-05 14:32:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312654240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938358391] [2021-06-05 14:32:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938358391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:08,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891670725] [2021-06-05 14:32:08,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:08,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:08,072 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,157 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-06-05 14:32:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,158 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:32:08,158 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:32:08,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:32:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-06-05 14:32:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-06-05 14:32:08,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-06-05 14:32:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,159 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-06-05 14:32:08,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-06-05 14:32:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:08,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,159 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:08,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1613,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,360 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 697142802, now seen corresponding path program 158 times [2021-06-05 14:32:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:08,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741963903] [2021-06-05 14:32:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:08,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741963903] [2021-06-05 14:32:08,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741963903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060299797] [2021-06-05 14:32:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060299797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:08,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147969084] [2021-06-05 14:32:08,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:08,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:08,534 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,567 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 14:32:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,568 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:32:08,568 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:32:08,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:32:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2021-06-05 14:32:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 165 transitions. [2021-06-05 14:32:08,569 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 165 transitions. Word has length 17 [2021-06-05 14:32:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,569 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 165 transitions. [2021-06-05 14:32:08,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 165 transitions. [2021-06-05 14:32:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:08,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,569 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:08,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,770 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 107602287, now seen corresponding path program 159 times [2021-06-05 14:32:08,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:08,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143787470] [2021-06-05 14:32:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143787470] [2021-06-05 14:32:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143787470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227781607] [2021-06-05 14:32:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:08,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227781607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383770081] [2021-06-05 14:32:08,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:08,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:08,968 INFO L87 Difference]: Start difference. First operand 82 states and 165 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:09,115 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 14:32:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:09,115 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:32:09,115 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:32:09,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:32:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2021-06-05 14:32:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 177 transitions. [2021-06-05 14:32:09,116 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 177 transitions. Word has length 17 [2021-06-05 14:32:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:09,116 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 177 transitions. [2021-06-05 14:32:09,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 177 transitions. [2021-06-05 14:32:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:09,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:09,117 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1620,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,317 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1629454384, now seen corresponding path program 160 times [2021-06-05 14:32:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494421164] [2021-06-05 14:32:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494421164] [2021-06-05 14:32:09,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494421164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041002310] [2021-06-05 14:32:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041002310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:09,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:09,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401060724] [2021-06-05 14:32:09,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:09,501 INFO L87 Difference]: Start difference. First operand 87 states and 177 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:09,545 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 14:32:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:09,546 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:32:09,546 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:32:09,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:32:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-06-05 14:32:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 177 transitions. [2021-06-05 14:32:09,547 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 177 transitions. Word has length 17 [2021-06-05 14:32:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:09,547 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 177 transitions. [2021-06-05 14:32:09,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 177 transitions. [2021-06-05 14:32:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:09,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:09,547 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1625,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,748 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 502058291, now seen corresponding path program 161 times [2021-06-05 14:32:09,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449407749] [2021-06-05 14:32:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449407749] [2021-06-05 14:32:09,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449407749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116934395] [2021-06-05 14:32:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:32:09,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116934395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:09,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:09,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049183423] [2021-06-05 14:32:09,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:09,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:09,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:09,950 INFO L87 Difference]: Start difference. First operand 87 states and 177 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,003 INFO L93 Difference]: Finished difference Result 88 states and 177 transitions. [2021-06-05 14:32:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,004 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:32:10,004 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:32:10,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:32:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-06-05 14:32:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-06-05 14:32:10,005 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 17 [2021-06-05 14:32:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,005 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-06-05 14:32:10,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-06-05 14:32:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:10,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,006 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:10,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1631 [2021-06-05 14:32:10,213 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1423480652, now seen corresponding path program 162 times [2021-06-05 14:32:10,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:10,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848964581] [2021-06-05 14:32:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848964581] [2021-06-05 14:32:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848964581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167708332] [2021-06-05 14:32:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:10,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167708332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:10,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133278231] [2021-06-05 14:32:10,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:10,404 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,472 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-06-05 14:32:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,472 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:32:10,473 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:32:10,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:32:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2021-06-05 14:32:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-06-05 14:32:10,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-06-05 14:32:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,474 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-06-05 14:32:10,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-06-05 14:32:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:10,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,474 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:10,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1635,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:10,693 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash -398743979, now seen corresponding path program 163 times [2021-06-05 14:32:10,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:10,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835539219] [2021-06-05 14:32:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:10,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835539219] [2021-06-05 14:32:10,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835539219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933978482] [2021-06-05 14:32:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:10,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933978482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:10,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903489946] [2021-06-05 14:32:10,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:10,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:10,863 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,923 INFO L93 Difference]: Finished difference Result 107 states and 205 transitions. [2021-06-05 14:32:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,924 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:32:10,924 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:32:10,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:32:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-06-05 14:32:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 14:32:10,925 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 14:32:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,926 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 14:32:10,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 14:32:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:10,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,926 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1641,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,142 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1123108118, now seen corresponding path program 164 times [2021-06-05 14:32:11,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865625950] [2021-06-05 14:32:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865625950] [2021-06-05 14:32:11,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865625950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847872653] [2021-06-05 14:32:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:11,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:11,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847872653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:11,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598980847] [2021-06-05 14:32:11,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:11,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:11,345 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:11,412 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-06-05 14:32:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:11,413 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:32:11,413 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:32:11,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:32:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-06-05 14:32:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 14:32:11,414 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 14:32:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 14:32:11,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 14:32:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:11,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:11,414 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1646 [2021-06-05 14:32:11,615 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash -4287975, now seen corresponding path program 165 times [2021-06-05 14:32:11,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014121258] [2021-06-05 14:32:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014121258] [2021-06-05 14:32:11,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014121258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622804175] [2021-06-05 14:32:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:32:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622804175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:11,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:11,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883138898] [2021-06-05 14:32:11,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:11,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:11,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:11,786 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:11,847 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-06-05 14:32:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:11,848 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:32:11,848 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:32:11,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:32:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2021-06-05 14:32:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 86 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 178 transitions. [2021-06-05 14:32:11,849 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 178 transitions. Word has length 17 [2021-06-05 14:32:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:11,849 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 178 transitions. [2021-06-05 14:32:11,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 178 transitions. [2021-06-05 14:32:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:11,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:11,849 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:12,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1651 [2021-06-05 14:32:12,050 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1929826918, now seen corresponding path program 166 times [2021-06-05 14:32:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:12,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105585860] [2021-06-05 14:32:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:12,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105585860] [2021-06-05 14:32:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105585860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085772437] [2021-06-05 14:32:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:12,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:12,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:12,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:12,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:32:12,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,318 INFO L628 ElimStorePlain]: treesize reduction 1, result has 92.3 percent of original size [2021-06-05 14:32:12,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:12,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 14:32:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085772437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:12,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410602937] [2021-06-05 14:32:12,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:12,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:12,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:12,351 INFO L87 Difference]: Start difference. First operand 87 states and 178 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:12,566 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-05 14:32:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:12,566 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:32:12,566 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:32:12,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:32:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-06-05 14:32:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-06-05 14:32:12,567 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-06-05 14:32:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:12,567 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-06-05 14:32:12,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-06-05 14:32:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:12,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:12,568 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:12,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 14:32:12,768 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 533567603, now seen corresponding path program 167 times [2021-06-05 14:32:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:12,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279251660] [2021-06-05 14:32:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279251660] [2021-06-05 14:32:12,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279251660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545617219] [2021-06-05 14:32:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:12,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:32:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545617219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:12,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:12,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374019796] [2021-06-05 14:32:12,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:12,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:12,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:12,939 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:12,989 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 14:32:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:12,989 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:32:12,989 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:32:12,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:32:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-06-05 14:32:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0375) internal successors, (163), 80 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 163 transitions. [2021-06-05 14:32:12,991 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 163 transitions. Word has length 17 [2021-06-05 14:32:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:12,991 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 163 transitions. [2021-06-05 14:32:12,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 163 transitions. [2021-06-05 14:32:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:12,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:12,991 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:13,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:13,191 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 218969618, now seen corresponding path program 168 times [2021-06-05 14:32:13,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:13,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012545665] [2021-06-05 14:32:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012545665] [2021-06-05 14:32:13,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012545665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466187581] [2021-06-05 14:32:13,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:13,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:13,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:13,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:13,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466187581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:13,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:13,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055779296] [2021-06-05 14:32:13,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:13,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:13,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:13,465 INFO L87 Difference]: Start difference. First operand 81 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:13,664 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 14:32:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:13,664 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:32:13,664 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:32:13,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:32:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-06-05 14:32:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2021-06-05 14:32:13,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 17 [2021-06-05 14:32:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:13,666 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2021-06-05 14:32:13,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2021-06-05 14:32:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:13,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:13,666 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:13,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 14:32:13,866 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1688724240, now seen corresponding path program 169 times [2021-06-05 14:32:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:13,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618318884] [2021-06-05 14:32:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:13,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618318884] [2021-06-05 14:32:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618318884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357509454] [2021-06-05 14:32:13,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357509454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:14,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671888297] [2021-06-05 14:32:14,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:14,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:14,087 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:14,155 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 14:32:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:14,156 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:32:14,156 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:32:14,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:32:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-06-05 14:32:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-06-05 14:32:14,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 17 [2021-06-05 14:32:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:14,157 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-06-05 14:32:14,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-06-05 14:32:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:14,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:14,157 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:14,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1688,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,361 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1478846963, now seen corresponding path program 170 times [2021-06-05 14:32:14,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:14,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559054591] [2021-06-05 14:32:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559054591] [2021-06-05 14:32:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559054591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628393124] [2021-06-05 14:32:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628393124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715128848] [2021-06-05 14:32:14,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:14,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:14,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:14,548 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:14,617 INFO L93 Difference]: Finished difference Result 124 states and 238 transitions. [2021-06-05 14:32:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:14,618 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:32:14,618 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 14:32:14,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 14:32:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2021-06-05 14:32:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 14:32:14,619 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 14:32:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:14,619 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 14:32:14,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 14:32:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:14,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:14,620 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:14,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-06-05 14:32:14,825 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2016702541, now seen corresponding path program 171 times [2021-06-05 14:32:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:14,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101375583] [2021-06-05 14:32:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101375583] [2021-06-05 14:32:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101375583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274719788] [2021-06-05 14:32:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274719788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:15,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021247806] [2021-06-05 14:32:15,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:15,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:15,039 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,101 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2021-06-05 14:32:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,102 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:32:15,102 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:32:15,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:32:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-06-05 14:32:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 14:32:15,103 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 14:32:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,103 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 14:32:15,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 14:32:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:15,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,103 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,304 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1702104556, now seen corresponding path program 172 times [2021-06-05 14:32:15,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793972884] [2021-06-05 14:32:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:15,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793972884] [2021-06-05 14:32:15,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793972884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049292870] [2021-06-05 14:32:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049292870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:15,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:15,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353960771] [2021-06-05 14:32:15,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:15,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:15,581 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,698 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 14:32:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,699 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:32:15,699 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:32:15,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:32:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-06-05 14:32:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-06-05 14:32:15,700 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-06-05 14:32:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,701 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-06-05 14:32:15,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-06-05 14:32:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:15,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,701 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1701 [2021-06-05 14:32:15,921 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1510356275, now seen corresponding path program 173 times [2021-06-05 14:32:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641256263] [2021-06-05 14:32:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:15,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641256263] [2021-06-05 14:32:15,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641256263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78682792] [2021-06-05 14:32:15,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78682792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:16,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772182119] [2021-06-05 14:32:16,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:16,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:16,077 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:16,137 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-06-05 14:32:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:16,138 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:32:16,138 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:32:16,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:32:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-06-05 14:32:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 161 transitions. [2021-06-05 14:32:16,139 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 161 transitions. Word has length 17 [2021-06-05 14:32:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:16,139 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 161 transitions. [2021-06-05 14:32:16,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 161 transitions. [2021-06-05 14:32:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:16,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:16,139 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:16,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1705 [2021-06-05 14:32:16,340 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash -404679564, now seen corresponding path program 174 times [2021-06-05 14:32:16,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:16,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106043894] [2021-06-05 14:32:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106043894] [2021-06-05 14:32:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106043894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062634151] [2021-06-05 14:32:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062634151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:16,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673000319] [2021-06-05 14:32:16,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:16,521 INFO L87 Difference]: Start difference. First operand 80 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:16,586 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 14:32:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:16,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:16,587 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:32:16,587 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:32:16,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:32:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-06-05 14:32:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-06-05 14:32:16,588 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-06-05 14:32:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:16,588 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-06-05 14:32:16,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-06-05 14:32:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:16,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:16,588 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:16,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,788 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 493814426, now seen corresponding path program 175 times [2021-06-05 14:32:16,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:16,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434273886] [2021-06-05 14:32:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434273886] [2021-06-05 14:32:16,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434273886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53491723] [2021-06-05 14:32:16,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53491723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:32:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153430751] [2021-06-05 14:32:17,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:32:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:32:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:32:17,029 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:17,134 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2021-06-05 14:32:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:17,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:17,135 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:32:17,135 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:32:17,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:32:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2021-06-05 14:32:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-06-05 14:32:17,136 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-06-05 14:32:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:17,136 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-06-05 14:32:17,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-06-05 14:32:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:17,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:17,137 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1713 [2021-06-05 14:32:17,353 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash -633581667, now seen corresponding path program 176 times [2021-06-05 14:32:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119539146] [2021-06-05 14:32:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119539146] [2021-06-05 14:32:17,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119539146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190697566] [2021-06-05 14:32:17,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:17,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190697566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705430343] [2021-06-05 14:32:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:17,526 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:17,620 INFO L93 Difference]: Finished difference Result 120 states and 228 transitions. [2021-06-05 14:32:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:17,621 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:32:17,621 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:32:17,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:32:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2021-06-05 14:32:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 14:32:17,622 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-06-05 14:32:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:17,622 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 14:32:17,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 14:32:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:17,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:17,622 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1720,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,823 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -95726089, now seen corresponding path program 177 times [2021-06-05 14:32:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264031206] [2021-06-05 14:32:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264031206] [2021-06-05 14:32:17,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264031206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360011589] [2021-06-05 14:32:17,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360011589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:17,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237565554] [2021-06-05 14:32:17,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:17,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:17,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:17,988 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:18,060 INFO L93 Difference]: Finished difference Result 97 states and 194 transitions. [2021-06-05 14:32:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:18,061 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:32:18,061 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:32:18,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:32:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-06-05 14:32:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 14:32:18,062 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-06-05 14:32:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:18,062 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 14:32:18,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 14:32:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:18,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:18,062 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:18,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,263 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -410324074, now seen corresponding path program 178 times [2021-06-05 14:32:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:18,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761392613] [2021-06-05 14:32:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761392613] [2021-06-05 14:32:18,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761392613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838130496] [2021-06-05 14:32:18,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838130496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:18,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:32:18,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816356772] [2021-06-05 14:32:18,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:32:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:32:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:32:18,504 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:18,600 INFO L93 Difference]: Finished difference Result 104 states and 197 transitions. [2021-06-05 14:32:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:18,601 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:32:18,601 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:32:18,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:32:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 14:32:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 14:32:18,602 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 14:32:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:18,602 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 14:32:18,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 14:32:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:18,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:18,602 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:18,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,803 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:18,803 INFO L82 PathProgramCache]: Analyzing trace with hash -602072355, now seen corresponding path program 179 times [2021-06-05 14:32:18,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:18,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152065208] [2021-06-05 14:32:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152065208] [2021-06-05 14:32:18,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152065208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197460390] [2021-06-05 14:32:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:18,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197460390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:18,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:18,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365951128] [2021-06-05 14:32:18,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:18,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:18,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:18,955 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,027 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 14:32:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,028 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:32:19,028 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:32:19,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:32:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2021-06-05 14:32:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 14:32:19,029 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 14:32:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,029 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 14:32:19,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 14:32:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:19,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,029 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:19,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:19,234 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1777859102, now seen corresponding path program 180 times [2021-06-05 14:32:19,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:19,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910821602] [2021-06-05 14:32:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:19,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910821602] [2021-06-05 14:32:19,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910821602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314158227] [2021-06-05 14:32:19,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:19,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:19,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314158227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:19,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:32:19,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238753398] [2021-06-05 14:32:19,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:32:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:32:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:32:19,433 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,537 INFO L93 Difference]: Finished difference Result 105 states and 197 transitions. [2021-06-05 14:32:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,538 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:32:19,538 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:32:19,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:32:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 14:32:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:32:19,540 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:32:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,540 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:32:19,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:32:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:19,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,540 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:19,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1735 [2021-06-05 14:32:19,740 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 438163443, now seen corresponding path program 181 times [2021-06-05 14:32:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:19,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206840095] [2021-06-05 14:32:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:19,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206840095] [2021-06-05 14:32:19,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206840095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606048212] [2021-06-05 14:32:19,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:19,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606048212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 14:32:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42102888] [2021-06-05 14:32:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:32:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:32:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:32:19,892 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,963 INFO L93 Difference]: Finished difference Result 113 states and 213 transitions. [2021-06-05 14:32:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,963 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:32:19,963 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:32:19,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:32:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 73. [2021-06-05 14:32:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 14:32:19,964 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 14:32:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,965 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 14:32:19,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 14:32:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:32:19,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,965 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-06-05 14:32:20,165 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,166 INFO L82 PathProgramCache]: Analyzing trace with hash 449161682, now seen corresponding path program 182 times [2021-06-05 14:32:20,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138792137] [2021-06-05 14:32:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138792137] [2021-06-05 14:32:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138792137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059549427] [2021-06-05 14:32:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:20,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:32:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059549427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:20,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:32:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122235083] [2021-06-05 14:32:20,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:32:20,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:32:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:32:20,363 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:20,541 INFO L93 Difference]: Finished difference Result 84 states and 160 transitions. [2021-06-05 14:32:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:32:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:20,541 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:32:20,541 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:32:20,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:32:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:32:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-06-05 14:32:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-06-05 14:32:20,542 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 17 [2021-06-05 14:32:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:20,542 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-06-05 14:32:20,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-06-05 14:32:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:20,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:20,543 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-06-05 14:32:20,743 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1483093275, now seen corresponding path program 183 times [2021-06-05 14:32:20,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506154755] [2021-06-05 14:32:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506154755] [2021-06-05 14:32:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506154755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755274807] [2021-06-05 14:32:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:21,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 1 [2021-06-05 14:32:21,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:32:21,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:32:21,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:32:21,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:32:21,455 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 14:32:21,461 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:32:21,467 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:21,472 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,476 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:21,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:21,489 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,492 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:21,497 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:21,501 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,504 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:32:21,508 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,511 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,564 INFO L628 ElimStorePlain]: treesize reduction 21, result has 73.8 percent of original size [2021-06-05 14:32:21,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:21,565 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:858, output treesize:41 [2021-06-05 14:32:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755274807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:21,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:32:21,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697353815] [2021-06-05 14:32:21,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:21,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:21,631 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:22,308 INFO L93 Difference]: Finished difference Result 144 states and 272 transitions. [2021-06-05 14:32:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:22,308 INFO L225 Difference]: With dead ends: 144 [2021-06-05 14:32:22,308 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:32:22,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:32:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2021-06-05 14:32:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 14:32:22,309 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 18 [2021-06-05 14:32:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:22,309 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 14:32:22,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 14:32:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:22,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:22,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:22,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,510 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash 993084581, now seen corresponding path program 184 times [2021-06-05 14:32:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:22,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831300141] [2021-06-05 14:32:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:22,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831300141] [2021-06-05 14:32:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831300141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021275866] [2021-06-05 14:32:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:23,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:23,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:23,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,375 INFO L628 ElimStorePlain]: treesize reduction 166, result has 31.4 percent of original size [2021-06-05 14:32:23,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:23,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:23,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:23,436 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:32:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:23,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021275866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:23,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325387124] [2021-06-05 14:32:23,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:23,506 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:24,257 INFO L93 Difference]: Finished difference Result 140 states and 265 transitions. [2021-06-05 14:32:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:24,257 INFO L225 Difference]: With dead ends: 140 [2021-06-05 14:32:24,257 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 14:32:24,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1033.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 14:32:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 79. [2021-06-05 14:32:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 14:32:24,259 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 14:32:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:24,259 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 14:32:24,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 14:32:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:24,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:24,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:24,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:24,459 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2108182377, now seen corresponding path program 185 times [2021-06-05 14:32:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:24,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875356310] [2021-06-05 14:32:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:24,963 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-05 14:32:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:25,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875356310] [2021-06-05 14:32:25,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875356310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767868214] [2021-06-05 14:32:25,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:25,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:25,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:25,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:25,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:32:25,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,730 INFO L628 ElimStorePlain]: treesize reduction 154, result has 31.6 percent of original size [2021-06-05 14:32:25,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:25,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:25,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:25,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:25,790 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:32:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767868214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:25,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:25,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872042782] [2021-06-05 14:32:25,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:25,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:25,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:25,861 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,456 INFO L93 Difference]: Finished difference Result 144 states and 273 transitions. [2021-06-05 14:32:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,457 INFO L225 Difference]: With dead ends: 144 [2021-06-05 14:32:26,457 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:32:26,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1289.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:32:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 80. [2021-06-05 14:32:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 159 transitions. [2021-06-05 14:32:26,458 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 159 transitions. Word has length 18 [2021-06-05 14:32:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,458 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 159 transitions. [2021-06-05 14:32:26,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 159 transitions. [2021-06-05 14:32:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:26,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,459 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:26,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1823 [2021-06-05 14:32:26,673 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1451416613, now seen corresponding path program 186 times [2021-06-05 14:32:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:26,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305467821] [2021-06-05 14:32:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305467821] [2021-06-05 14:32:26,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305467821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861605412] [2021-06-05 14:32:26,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:26,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:27,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:27,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:27,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:27,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:27,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:27,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:27,204 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:32:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861605412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:27,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688683543] [2021-06-05 14:32:27,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:27,278 INFO L87 Difference]: Start difference. First operand 80 states and 159 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:27,854 INFO L93 Difference]: Finished difference Result 145 states and 276 transitions. [2021-06-05 14:32:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:27,854 INFO L225 Difference]: With dead ends: 145 [2021-06-05 14:32:27,854 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:32:27,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 785.4ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:32:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 81. [2021-06-05 14:32:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 14:32:27,856 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 14:32:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:27,856 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 14:32:27,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 14:32:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:27,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:27,856 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:28,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:28,056 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1845872617, now seen corresponding path program 187 times [2021-06-05 14:32:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:28,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000103628] [2021-06-05 14:32:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:28,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:28,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000103628] [2021-06-05 14:32:28,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000103628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586012137] [2021-06-05 14:32:28,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:28,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:28,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:28,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,842 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-06-05 14:32:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:28,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:28,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:28,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:28,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:28,907 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:32:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:29,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586012137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:29,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650770407] [2021-06-05 14:32:29,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:29,015 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,577 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 14:32:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:29,593 INFO L93 Difference]: Finished difference Result 157 states and 295 transitions. [2021-06-05 14:32:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:29,594 INFO L225 Difference]: With dead ends: 157 [2021-06-05 14:32:29,594 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:32:29,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:32:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 82. [2021-06-05 14:32:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.049382716049383) internal successors, (166), 81 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2021-06-05 14:32:29,595 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 18 [2021-06-05 14:32:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:29,595 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2021-06-05 14:32:29,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2021-06-05 14:32:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:29,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:29,596 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:29,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1859 [2021-06-05 14:32:29,796 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash 109094885, now seen corresponding path program 188 times [2021-06-05 14:32:29,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:29,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874469004] [2021-06-05 14:32:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:29,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874469004] [2021-06-05 14:32:29,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874469004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751035693] [2021-06-05 14:32:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:30,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:30,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:30,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:30,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,573 INFO L628 ElimStorePlain]: treesize reduction 160, result has 32.5 percent of original size [2021-06-05 14:32:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:30,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:30,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:30,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:30,635 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:32:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:30,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751035693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:30,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:32:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103709939] [2021-06-05 14:32:30,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:32:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:32:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:30,742 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,267 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 14:32:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:31,289 INFO L93 Difference]: Finished difference Result 145 states and 277 transitions. [2021-06-05 14:32:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:31,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:31,290 INFO L225 Difference]: With dead ends: 145 [2021-06-05 14:32:31,290 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 14:32:31,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 812.6ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 14:32:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 81. [2021-06-05 14:32:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 14:32:31,291 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 14:32:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:31,291 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 14:32:31,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 14:32:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:31,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:31,291 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:31,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-06-05 14:32:31,492 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1761287433, now seen corresponding path program 189 times [2021-06-05 14:32:31,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:31,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446400721] [2021-06-05 14:32:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:31,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:31,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446400721] [2021-06-05 14:32:31,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446400721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362903450] [2021-06-05 14:32:31,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:31,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:32,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:32:32,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:32,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:32,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,276 INFO L628 ElimStorePlain]: treesize reduction 256, result has 22.2 percent of original size [2021-06-05 14:32:32,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:32,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 14:32:32,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:32,335 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:498, output treesize:41 [2021-06-05 14:32:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362903450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:32,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:32,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:32,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335592408] [2021-06-05 14:32:32,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:32,404 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:32,980 INFO L93 Difference]: Finished difference Result 127 states and 245 transitions. [2021-06-05 14:32:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:32,980 INFO L225 Difference]: With dead ends: 127 [2021-06-05 14:32:32,980 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:32:32,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 829.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:32:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-06-05 14:32:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 14:32:32,981 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 14:32:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:32,981 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 14:32:32,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 14:32:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:32,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:32,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:33,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1910,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:33,182 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -646189637, now seen corresponding path program 190 times [2021-06-05 14:32:33,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:33,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524937788] [2021-06-05 14:32:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524937788] [2021-06-05 14:32:33,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524937788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143816829] [2021-06-05 14:32:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:33,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:33,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:33,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:33,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:33,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:33,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:33,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-06-05 14:32:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143816829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:33,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:32:33,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248773343] [2021-06-05 14:32:33,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:33,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:33,914 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:34,205 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-06-05 14:32:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:34,206 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:32:34,206 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 14:32:34,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 14:32:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-06-05 14:32:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 14:32:34,207 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 14:32:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:34,207 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 14:32:34,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 14:32:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:34,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:34,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:34,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1934 [2021-06-05 14:32:34,408 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1302955401, now seen corresponding path program 191 times [2021-06-05 14:32:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788135400] [2021-06-05 14:32:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:34,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:34,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788135400] [2021-06-05 14:32:34,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788135400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:34,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360166644] [2021-06-05 14:32:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:35,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:35,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:35,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:35,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:35,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:35,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:35,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:35,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:35,356 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-06-05 14:32:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:35,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360166644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:35,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354490626] [2021-06-05 14:32:35,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:35,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:35,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:35,428 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:35,805 INFO L93 Difference]: Finished difference Result 130 states and 254 transitions. [2021-06-05 14:32:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:35,806 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:32:35,806 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:32:35,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 913.0ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:32:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-06-05 14:32:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-05 14:32:35,807 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-05 14:32:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:35,807 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-05 14:32:35,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-05 14:32:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:35,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:35,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:36,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1950,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,008 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash -908499397, now seen corresponding path program 192 times [2021-06-05 14:32:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:36,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724157382] [2021-06-05 14:32:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:36,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724157382] [2021-06-05 14:32:36,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724157382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48265496] [2021-06-05 14:32:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:36,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:36,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:36,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:36,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:36,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:36,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:36,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:36,699 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-06-05 14:32:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48265496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:36,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:36,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868323364] [2021-06-05 14:32:36,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:36,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:36,807 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:37,158 INFO L93 Difference]: Finished difference Result 142 states and 273 transitions. [2021-06-05 14:32:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:37,159 INFO L225 Difference]: With dead ends: 142 [2021-06-05 14:32:37,159 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 14:32:37,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 14:32:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 88. [2021-06-05 14:32:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 183 transitions. [2021-06-05 14:32:37,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 183 transitions. Word has length 18 [2021-06-05 14:32:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:37,160 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 183 transitions. [2021-06-05 14:32:37,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 183 transitions. [2021-06-05 14:32:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:37,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:37,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:37,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1961 [2021-06-05 14:32:37,361 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1649690167, now seen corresponding path program 193 times [2021-06-05 14:32:37,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:37,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757866102] [2021-06-05 14:32:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:37,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757866102] [2021-06-05 14:32:37,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757866102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630831183] [2021-06-05 14:32:37,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:32:37,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:37,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:37,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:32:37,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,037 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 14:32:38,038 INFO L628 ElimStorePlain]: treesize reduction 260, result has 21.2 percent of original size [2021-06-05 14:32:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:38,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:38,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:38,098 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:32:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:38,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630831183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:38,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:38,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:38,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796511284] [2021-06-05 14:32:38,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:38,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:38,203 INFO L87 Difference]: Start difference. First operand 88 states and 183 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:38,572 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-06-05 14:32:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:38,573 INFO L225 Difference]: With dead ends: 130 [2021-06-05 14:32:38,573 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:32:38,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:32:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-06-05 14:32:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 14:32:38,574 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 14:32:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:38,574 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 14:32:38,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 14:32:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:38,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:38,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:38,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-05 14:32:38,775 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:38,775 INFO L82 PathProgramCache]: Analyzing trace with hash 836945301, now seen corresponding path program 194 times [2021-06-05 14:32:38,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:38,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947327191] [2021-06-05 14:32:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947327191] [2021-06-05 14:32:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947327191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874500527] [2021-06-05 14:32:39,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:39,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:39,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:39,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:39,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:39,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:39,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,520 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-06-05 14:32:39,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:39,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:39,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:39,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:39,579 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:32:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874500527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:39,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:39,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568763598] [2021-06-05 14:32:39,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:39,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:39,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:39,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:39,647 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:40,080 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-06-05 14:32:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:40,081 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:32:40,081 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:32:40,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:32:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-06-05 14:32:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 179 transitions. [2021-06-05 14:32:40,082 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 179 transitions. Word has length 18 [2021-06-05 14:32:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:40,082 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 179 transitions. [2021-06-05 14:32:40,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 179 transitions. [2021-06-05 14:32:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:40,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:40,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:40,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1994 [2021-06-05 14:32:40,283 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:40,283 INFO L82 PathProgramCache]: Analyzing trace with hash 180179537, now seen corresponding path program 195 times [2021-06-05 14:32:40,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:40,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843474416] [2021-06-05 14:32:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843474416] [2021-06-05 14:32:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843474416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966422403] [2021-06-05 14:32:40,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:40,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:40,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:40,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:32:40,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,978 INFO L628 ElimStorePlain]: treesize reduction 166, result has 31.7 percent of original size [2021-06-05 14:32:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-06-05 14:32:40,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 14:32:41,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:41,036 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:361, output treesize:41 [2021-06-05 14:32:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966422403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:41,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020715477] [2021-06-05 14:32:41,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:41,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:41,105 INFO L87 Difference]: Start difference. First operand 88 states and 179 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,933 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 14:32:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:42,016 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-05 14:32:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:32:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:42,017 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:32:42,017 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 14:32:42,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:32:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 14:32:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2021-06-05 14:32:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.097826086956522) internal successors, (193), 92 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 193 transitions. [2021-06-05 14:32:42,018 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 193 transitions. Word has length 18 [2021-06-05 14:32:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:42,018 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 193 transitions. [2021-06-05 14:32:42,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 193 transitions. [2021-06-05 14:32:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:42,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:42,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:42,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2017 [2021-06-05 14:32:42,219 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash 574635541, now seen corresponding path program 196 times [2021-06-05 14:32:42,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:42,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119343195] [2021-06-05 14:32:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:42,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119343195] [2021-06-05 14:32:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119343195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905405406] [2021-06-05 14:32:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:42,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:42,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:42,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:42,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:42,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,897 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:32:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:42,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:42,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:42,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:42,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:42,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:42,959 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:32:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905405406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:43,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:32:43,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277870602] [2021-06-05 14:32:43,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:43,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:43,062 INFO L87 Difference]: Start difference. First operand 93 states and 193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:43,579 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 14:32:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:43,580 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:32:43,580 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:32:43,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:32:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2021-06-05 14:32:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.127659574468085) internal successors, (200), 94 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 200 transitions. [2021-06-05 14:32:43,581 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 200 transitions. Word has length 18 [2021-06-05 14:32:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:43,581 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 200 transitions. [2021-06-05 14:32:43,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 200 transitions. [2021-06-05 14:32:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:43,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:43,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:43,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2042,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,782 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1162142191, now seen corresponding path program 197 times [2021-06-05 14:32:43,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:43,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230419619] [2021-06-05 14:32:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:43,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230419619] [2021-06-05 14:32:43,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230419619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006304140] [2021-06-05 14:32:43,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:43,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:44,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:44,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:44,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:44,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:44,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:44,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:44,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:44,218 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-06-05 14:32:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006304140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:44,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:44,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474940619] [2021-06-05 14:32:44,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:44,343 INFO L87 Difference]: Start difference. First operand 95 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:44,788 INFO L93 Difference]: Finished difference Result 136 states and 271 transitions. [2021-06-05 14:32:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:44,789 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:32:44,789 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 14:32:44,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 14:32:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-06-05 14:32:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-06-05 14:32:44,790 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 18 [2021-06-05 14:32:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:44,790 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-06-05 14:32:44,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-06-05 14:32:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:44,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:44,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:44,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2066,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:44,991 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash -326166729, now seen corresponding path program 198 times [2021-06-05 14:32:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:44,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114926448] [2021-06-05 14:32:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114926448] [2021-06-05 14:32:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114926448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143660171] [2021-06-05 14:32:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:45,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:45,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:45,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:32:45,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:45,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:32:45,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:45,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:32:45,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:32:45,640 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:32:45,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:45,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:32:45,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:45,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:45,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:45,687 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:373, output treesize:41 [2021-06-05 14:32:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143660171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:45,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269139958] [2021-06-05 14:32:45,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:45,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:45,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:45,787 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,255 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 14:32:46,429 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:32:46,880 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 14:32:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:47,359 INFO L93 Difference]: Finished difference Result 215 states and 407 transitions. [2021-06-05 14:32:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:32:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:47,360 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:32:47,360 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:32:47,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1614.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:32:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:32:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2021-06-05 14:32:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.146788990825688) internal successors, (234), 109 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 234 transitions. [2021-06-05 14:32:47,361 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 234 transitions. Word has length 18 [2021-06-05 14:32:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:47,361 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 234 transitions. [2021-06-05 14:32:47,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 234 transitions. [2021-06-05 14:32:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:47,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:47,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:47,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,562 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash 68289275, now seen corresponding path program 199 times [2021-06-05 14:32:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:47,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278875122] [2021-06-05 14:32:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:47,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:47,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278875122] [2021-06-05 14:32:47,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278875122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379227521] [2021-06-05 14:32:47,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:48,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:48,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:48,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:48,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:48,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,276 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:32:48,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:48,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:48,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:48,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:48,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:48,340 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:32:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379227521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:48,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:32:48,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633821196] [2021-06-05 14:32:48,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:48,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:48,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:48,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:48,443 INFO L87 Difference]: Start difference. First operand 110 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:49,078 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-06-05 14:32:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:49,078 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:32:49,079 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:32:49,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:32:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2021-06-05 14:32:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 14:32:49,080 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-06-05 14:32:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:49,080 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 14:32:49,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 14:32:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:49,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:49,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:49,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-06-05 14:32:49,281 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1668488457, now seen corresponding path program 200 times [2021-06-05 14:32:49,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:49,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967178976] [2021-06-05 14:32:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:49,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:49,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967178976] [2021-06-05 14:32:49,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967178976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:49,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391393701] [2021-06-05 14:32:49,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:49,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:49,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:49,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:49,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:49,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,938 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:32:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:49,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:49,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:49,999 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:32:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391393701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:50,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:32:50,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161628009] [2021-06-05 14:32:50,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:50,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:50,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:50,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:50,101 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:50,753 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-05 14:32:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:50,754 INFO L225 Difference]: With dead ends: 151 [2021-06-05 14:32:50,754 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 14:32:50,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 14:32:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-06-05 14:32:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 109 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 231 transitions. [2021-06-05 14:32:50,755 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 231 transitions. Word has length 18 [2021-06-05 14:32:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:50,755 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 231 transitions. [2021-06-05 14:32:50,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 231 transitions. [2021-06-05 14:32:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:50,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:50,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:50,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-06-05 14:32:50,956 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 606144853, now seen corresponding path program 201 times [2021-06-05 14:32:50,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:50,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852141801] [2021-06-05 14:32:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852141801] [2021-06-05 14:32:51,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852141801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561057508] [2021-06-05 14:32:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:51,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:32:51,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:32:51,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:32:51,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:51,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:32:51,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:51,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:51,783 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:32:51,787 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:32:51,791 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:32:51,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:32:51,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:51,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:32:51,806 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:51,834 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:488, output treesize:40 [2021-06-05 14:32:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561057508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:51,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:32:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825214009] [2021-06-05 14:32:51,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:32:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:32:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:51,939 INFO L87 Difference]: Start difference. First operand 110 states and 231 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,650 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 14:32:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:53,803 INFO L93 Difference]: Finished difference Result 318 states and 598 transitions. [2021-06-05 14:32:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:32:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:53,803 INFO L225 Difference]: With dead ends: 318 [2021-06-05 14:32:53,803 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 14:32:53,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1904.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:32:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 14:32:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 126. [2021-06-05 14:32:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-06-05 14:32:53,805 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-06-05 14:32:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:53,805 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-06-05 14:32:53,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-06-05 14:32:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:53,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:53,806 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:54,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2181,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,006 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1130632879, now seen corresponding path program 202 times [2021-06-05 14:32:54,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:54,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670930238] [2021-06-05 14:32:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670930238] [2021-06-05 14:32:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670930238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498156910] [2021-06-05 14:32:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:54,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:54,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:54,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:54,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:54,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:54,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:32:54,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:54,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:54,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:54,617 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:54,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:54,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:54,629 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:54,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:54,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:54,660 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-06-05 14:32:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498156910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:54,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:32:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021018343] [2021-06-05 14:32:54,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:32:54,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:32:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:54,771 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:55,322 INFO L93 Difference]: Finished difference Result 197 states and 386 transitions. [2021-06-05 14:32:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:32:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:55,322 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:32:55,322 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:32:55,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:32:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 126. [2021-06-05 14:32:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-06-05 14:32:55,324 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-06-05 14:32:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:55,324 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-06-05 14:32:55,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-06-05 14:32:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:55,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:55,324 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:55,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,525 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1848177113, now seen corresponding path program 203 times [2021-06-05 14:32:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:55,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204116227] [2021-06-05 14:32:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204116227] [2021-06-05 14:32:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204116227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384021726] [2021-06-05 14:32:55,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:32:55,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:56,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:56,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:56,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:56,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:56,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:56,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,223 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:32:56,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:56,224 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:32:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384021726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:56,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:32:56,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849565819] [2021-06-05 14:32:56,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:32:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:32:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:56,292 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:56,801 INFO L93 Difference]: Finished difference Result 185 states and 369 transitions. [2021-06-05 14:32:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:32:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:56,801 INFO L225 Difference]: With dead ends: 185 [2021-06-05 14:32:56,801 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:32:56,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 822.3ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:32:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2021-06-05 14:32:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.2440944881889764) internal successors, (285), 127 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 285 transitions. [2021-06-05 14:32:56,803 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 285 transitions. Word has length 18 [2021-06-05 14:32:56,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:56,803 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 285 transitions. [2021-06-05 14:32:56,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 285 transitions. [2021-06-05 14:32:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:56,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:56,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:57,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2327 [2021-06-05 14:32:57,004 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1247473947, now seen corresponding path program 204 times [2021-06-05 14:32:57,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:57,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250883120] [2021-06-05 14:32:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250883120] [2021-06-05 14:32:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250883120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211404314] [2021-06-05 14:32:57,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:57,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:57,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:57,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:57,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:57,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:57,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:32:57,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,658 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:32:57,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:57,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:57,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:57,716 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:32:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211404314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:32:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92813357] [2021-06-05 14:32:57,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:57,785 INFO L87 Difference]: Start difference. First operand 128 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:58,097 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-05 14:32:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:58,097 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:32:58,098 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:32:58,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:32:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-06-05 14:32:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.25) internal successors, (288), 128 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 288 transitions. [2021-06-05 14:32:58,099 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 288 transitions. Word has length 18 [2021-06-05 14:32:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:58,099 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 288 transitions. [2021-06-05 14:32:58,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 288 transitions. [2021-06-05 14:32:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:58,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:58,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-06-05 14:32:58,300 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash -132376151, now seen corresponding path program 205 times [2021-06-05 14:32:58,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:58,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894633151] [2021-06-05 14:32:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:58,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894633151] [2021-06-05 14:32:58,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894633151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287321134] [2021-06-05 14:32:58,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:32:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:58,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:32:58,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:32:58,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:58,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:32:58,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,034 INFO L628 ElimStorePlain]: treesize reduction 247, result has 23.5 percent of original size [2021-06-05 14:32:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:59,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:59,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:59,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:59,094 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-06-05 14:32:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287321134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:32:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199993216] [2021-06-05 14:32:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:59,153 INFO L87 Difference]: Start difference. First operand 129 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:59,520 INFO L93 Difference]: Finished difference Result 154 states and 330 transitions. [2021-06-05 14:32:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:32:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:59,521 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:32:59,521 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:32:59,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:32:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:32:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 130. [2021-06-05 14:32:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.255813953488372) internal successors, (291), 129 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 291 transitions. [2021-06-05 14:32:59,522 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 291 transitions. Word has length 18 [2021-06-05 14:32:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 291 transitions. [2021-06-05 14:32:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 291 transitions. [2021-06-05 14:32:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:32:59,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:59,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:59,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2363,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,723 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash -789141915, now seen corresponding path program 206 times [2021-06-05 14:32:59,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:59,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719729065] [2021-06-05 14:32:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:59,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719729065] [2021-06-05 14:32:59,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719729065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310495672] [2021-06-05 14:32:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:00,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:00,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:00,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:00,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:00,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:00,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:00,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:00,261 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:111, output treesize:41 [2021-06-05 14:33:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:00,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310495672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:00,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:00,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:33:00,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332156757] [2021-06-05 14:33:00,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:00,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:00,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:00,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:00,322 INFO L87 Difference]: Start difference. First operand 130 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:00,662 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2021-06-05 14:33:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:00,663 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:33:00,663 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:33:00,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:33:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2021-06-05 14:33:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.2615384615384615) internal successors, (294), 130 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 294 transitions. [2021-06-05 14:33:00,664 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 294 transitions. Word has length 18 [2021-06-05 14:33:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:00,664 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 294 transitions. [2021-06-05 14:33:00,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 294 transitions. [2021-06-05 14:33:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:00,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:00,665 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:00,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2402 [2021-06-05 14:33:00,865 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -394685911, now seen corresponding path program 207 times [2021-06-05 14:33:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000397699] [2021-06-05 14:33:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000397699] [2021-06-05 14:33:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000397699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479676142] [2021-06-05 14:33:01,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:01,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:33:01,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:33:01,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:01,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:01,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:01,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:01,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:01,726 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:01,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:33:01,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:01,744 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:33:01,749 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:01,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,843 INFO L628 ElimStorePlain]: treesize reduction 26, result has 74.5 percent of original size [2021-06-05 14:33:01,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:01,846 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:568, output treesize:40 [2021-06-05 14:33:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479676142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:01,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:33:01,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710103066] [2021-06-05 14:33:01,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:33:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:33:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:01,990 INFO L87 Difference]: Start difference. First operand 131 states and 294 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,758 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 14:33:02,943 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 14:33:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:02,956 INFO L93 Difference]: Finished difference Result 294 states and 604 transitions. [2021-06-05 14:33:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:02,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:02,961 INFO L225 Difference]: With dead ends: 294 [2021-06-05 14:33:02,961 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 14:33:02,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1260.0ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 14:33:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 159. [2021-06-05 14:33:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-06-05 14:33:02,964 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-06-05 14:33:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:02,964 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-06-05 14:33:02,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-06-05 14:33:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:02,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:02,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:03,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-06-05 14:33:03,185 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2131463643, now seen corresponding path program 208 times [2021-06-05 14:33:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448712527] [2021-06-05 14:33:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:03,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448712527] [2021-06-05 14:33:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448712527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618990774] [2021-06-05 14:33:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:03,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:03,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:03,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:03,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:03,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:03,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:03,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,984 INFO L628 ElimStorePlain]: treesize reduction 241, result has 23.7 percent of original size [2021-06-05 14:33:03,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:03,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:04,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:04,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:04,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:04,046 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:448, output treesize:40 [2021-06-05 14:33:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618990774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:04,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015241068] [2021-06-05 14:33:04,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:04,149 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:04,527 INFO L93 Difference]: Finished difference Result 183 states and 419 transitions. [2021-06-05 14:33:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:04,527 INFO L225 Difference]: With dead ends: 183 [2021-06-05 14:33:04,527 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:33:04,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:33:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2021-06-05 14:33:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-06-05 14:33:04,529 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-06-05 14:33:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:04,529 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-06-05 14:33:04,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-06-05 14:33:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:04,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:04,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:04,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2444,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:04,741 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:04,741 INFO L82 PathProgramCache]: Analyzing trace with hash 83301609, now seen corresponding path program 209 times [2021-06-05 14:33:04,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:04,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555617003] [2021-06-05 14:33:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555617003] [2021-06-05 14:33:04,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555617003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52407403] [2021-06-05 14:33:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:04,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:05,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:05,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:05,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:05,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:05,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,418 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-06-05 14:33:05,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:05,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:05,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:05,451 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:05,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:05,478 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:33:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52407403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:05,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:05,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710401416] [2021-06-05 14:33:05,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:05,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:05,546 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:05,879 INFO L93 Difference]: Finished difference Result 195 states and 436 transitions. [2021-06-05 14:33:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:05,880 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:33:05,880 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:33:05,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:33:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 159. [2021-06-05 14:33:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.411392405063291) internal successors, (381), 158 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 381 transitions. [2021-06-05 14:33:05,882 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 381 transitions. Word has length 18 [2021-06-05 14:33:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:05,882 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 381 transitions. [2021-06-05 14:33:05,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 381 transitions. [2021-06-05 14:33:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:05,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:05,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:06,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2483,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,101 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash -573464155, now seen corresponding path program 210 times [2021-06-05 14:33:06,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:06,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137313560] [2021-06-05 14:33:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:06,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137313560] [2021-06-05 14:33:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137313560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553255729] [2021-06-05 14:33:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:06,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:06,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:33:06,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:06,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:33:06,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:33:06,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:06,854 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:06,858 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:33:06,863 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:06,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:06,872 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:06,875 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:06,911 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:572, output treesize:41 [2021-06-05 14:33:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:06,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553255729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:06,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:06,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823604304] [2021-06-05 14:33:06,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:06,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:06,972 INFO L87 Difference]: Start difference. First operand 159 states and 381 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,744 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 14:33:07,999 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 14:33:08,129 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 14:33:08,397 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 14:33:08,529 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 14:33:08,738 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 14:33:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:08,765 INFO L93 Difference]: Finished difference Result 291 states and 613 transitions. [2021-06-05 14:33:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:33:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:08,766 INFO L225 Difference]: With dead ends: 291 [2021-06-05 14:33:08,766 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 14:33:08,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1813.2ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:33:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 14:33:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 157. [2021-06-05 14:33:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.3846153846153846) internal successors, (372), 156 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 372 transitions. [2021-06-05 14:33:08,768 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 372 transitions. Word has length 18 [2021-06-05 14:33:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:08,768 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 372 transitions. [2021-06-05 14:33:08,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 372 transitions. [2021-06-05 14:33:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:08,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:08,768 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:08,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:08,969 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:08,969 INFO L82 PathProgramCache]: Analyzing trace with hash -179008151, now seen corresponding path program 211 times [2021-06-05 14:33:08,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:08,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339293512] [2021-06-05 14:33:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:09,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339293512] [2021-06-05 14:33:09,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339293512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288903704] [2021-06-05 14:33:09,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:09,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:09,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:09,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:09,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:09,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:09,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,571 INFO L628 ElimStorePlain]: treesize reduction 240, result has 22.6 percent of original size [2021-06-05 14:33:09,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:09,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:09,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:09,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:09,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:09,632 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:33:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288903704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:09,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:09,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68505161] [2021-06-05 14:33:09,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:09,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:09,725 INFO L87 Difference]: Start difference. First operand 157 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:10,250 INFO L93 Difference]: Finished difference Result 207 states and 444 transitions. [2021-06-05 14:33:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:10,251 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:33:10,251 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:33:10,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:33:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-06-05 14:33:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.378205128205128) internal successors, (371), 156 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 371 transitions. [2021-06-05 14:33:10,252 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 371 transitions. Word has length 18 [2021-06-05 14:33:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:10,252 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 371 transitions. [2021-06-05 14:33:10,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 371 transitions. [2021-06-05 14:33:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:10,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:10,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:10,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,453 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1915785883, now seen corresponding path program 212 times [2021-06-05 14:33:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:10,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280464882] [2021-06-05 14:33:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:10,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280464882] [2021-06-05 14:33:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280464882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142137919] [2021-06-05 14:33:10,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:10,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:10,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:10,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:10,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:11,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:11,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,104 INFO L628 ElimStorePlain]: treesize reduction 260, result has 21.2 percent of original size [2021-06-05 14:33:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:11,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:11,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:11,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:11,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:11,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:11,171 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:33:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142137919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:11,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552722233] [2021-06-05 14:33:11,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:11,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:11,273 INFO L87 Difference]: Start difference. First operand 157 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:11,839 INFO L93 Difference]: Finished difference Result 195 states and 428 transitions. [2021-06-05 14:33:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:11,839 INFO L225 Difference]: With dead ends: 195 [2021-06-05 14:33:11,839 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:33:11,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:33:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-06-05 14:33:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.3741935483870966) internal successors, (368), 155 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 368 transitions. [2021-06-05 14:33:11,841 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 368 transitions. Word has length 18 [2021-06-05 14:33:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:11,841 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 368 transitions. [2021-06-05 14:33:11,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 368 transitions. [2021-06-05 14:33:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:11,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:11,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:12,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2562 [2021-06-05 14:33:12,042 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 403324517, now seen corresponding path program 213 times [2021-06-05 14:33:12,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:12,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004114534] [2021-06-05 14:33:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:12,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:12,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004114534] [2021-06-05 14:33:12,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004114534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168498616] [2021-06-05 14:33:12,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:12,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:12,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:12,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:12,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:12,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:12,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:12,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,954 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-06-05 14:33:12,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:12,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:12,989 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:13,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:13,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:13,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:33:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168498616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:13,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:13,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:33:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162226935] [2021-06-05 14:33:13,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:13,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:13,083 INFO L87 Difference]: Start difference. First operand 156 states and 368 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:13,926 INFO L93 Difference]: Finished difference Result 279 states and 591 transitions. [2021-06-05 14:33:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:33:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:13,927 INFO L225 Difference]: With dead ends: 279 [2021-06-05 14:33:13,927 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 14:33:13,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1166.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:33:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 14:33:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 166. [2021-06-05 14:33:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4363636363636365) internal successors, (402), 165 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 402 transitions. [2021-06-05 14:33:13,929 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 402 transitions. Word has length 18 [2021-06-05 14:33:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:13,929 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 402 transitions. [2021-06-05 14:33:13,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 402 transitions. [2021-06-05 14:33:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:13,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:13,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:14,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 14:33:14,130 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash 797780521, now seen corresponding path program 214 times [2021-06-05 14:33:14,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:14,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367521623] [2021-06-05 14:33:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:14,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367521623] [2021-06-05 14:33:14,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367521623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322163527] [2021-06-05 14:33:14,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:14,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:14,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:14,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:14,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:14,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:14,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:14,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,702 INFO L628 ElimStorePlain]: treesize reduction 235, result has 24.2 percent of original size [2021-06-05 14:33:14,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:14,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:14,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:14,766 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:439, output treesize:40 [2021-06-05 14:33:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322163527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:14,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:33:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439793347] [2021-06-05 14:33:14,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:14,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:14,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:14,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:14,866 INFO L87 Difference]: Start difference. First operand 166 states and 402 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:15,237 INFO L93 Difference]: Finished difference Result 245 states and 530 transitions. [2021-06-05 14:33:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:15,238 INFO L225 Difference]: With dead ends: 245 [2021-06-05 14:33:15,238 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 14:33:15,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 14:33:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 168. [2021-06-05 14:33:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4491017964071857) internal successors, (409), 167 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 409 transitions. [2021-06-05 14:33:15,240 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 409 transitions. Word has length 18 [2021-06-05 14:33:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:15,240 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 409 transitions. [2021-06-05 14:33:15,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 409 transitions. [2021-06-05 14:33:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:15,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:15,272 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:15,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2613 [2021-06-05 14:33:15,495 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -938997211, now seen corresponding path program 215 times [2021-06-05 14:33:15,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:15,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176673317] [2021-06-05 14:33:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:15,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176673317] [2021-06-05 14:33:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176673317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712204511] [2021-06-05 14:33:15,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:33:15,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:15,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:15,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:15,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:15,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:15,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:15,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:15,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:15,959 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:33:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712204511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:33:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330263003] [2021-06-05 14:33:16,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:16,063 INFO L87 Difference]: Start difference. First operand 168 states and 409 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:16,405 INFO L93 Difference]: Finished difference Result 230 states and 506 transitions. [2021-06-05 14:33:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:16,406 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:33:16,406 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:33:16,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:33:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-06-05 14:33:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4397590361445785) internal successors, (405), 166 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 405 transitions. [2021-06-05 14:33:16,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 405 transitions. Word has length 18 [2021-06-05 14:33:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:16,412 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 405 transitions. [2021-06-05 14:33:16,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 405 transitions. [2021-06-05 14:33:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:16,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:16,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:16,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-06-05 14:33:16,612 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1335636099, now seen corresponding path program 216 times [2021-06-05 14:33:16,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:16,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986943719] [2021-06-05 14:33:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:33:16,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:16,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986943719] [2021-06-05 14:33:16,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986943719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77789669] [2021-06-05 14:33:16,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:16,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:16,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:16,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:16,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:16,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:16,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:16,969 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:16,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:16,987 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:176, output treesize:40 [2021-06-05 14:33:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:17,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77789669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:17,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:33:17,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425523657] [2021-06-05 14:33:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:17,089 INFO L87 Difference]: Start difference. First operand 167 states and 405 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:17,582 INFO L93 Difference]: Finished difference Result 209 states and 469 transitions. [2021-06-05 14:33:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:17,583 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:33:17,583 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:33:17,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:33:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:33:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 167. [2021-06-05 14:33:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-06-05 14:33:17,585 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-06-05 14:33:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:17,585 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-06-05 14:33:17,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-06-05 14:33:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:17,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:17,585 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:17,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2651 [2021-06-05 14:33:17,786 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -401141633, now seen corresponding path program 217 times [2021-06-05 14:33:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364589221] [2021-06-05 14:33:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:33:17,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:17,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364589221] [2021-06-05 14:33:17,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364589221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469964306] [2021-06-05 14:33:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:18,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:18,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:18,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:18,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:18,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:18,353 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:18,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:18,362 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:18,368 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:18,373 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:18,378 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:18,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:18,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:18,390 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:18,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:18,397 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,452 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-06-05 14:33:18,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:18,454 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-06-05 14:33:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469964306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:33:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496812200] [2021-06-05 14:33:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:18,555 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:19,074 INFO L93 Difference]: Finished difference Result 211 states and 471 transitions. [2021-06-05 14:33:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:19,075 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:33:19,075 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:33:19,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:33:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-06-05 14:33:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-06-05 14:33:19,077 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-06-05 14:33:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:19,077 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-06-05 14:33:19,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-06-05 14:33:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:19,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:19,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:19,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2661 [2021-06-05 14:33:19,278 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1717298937, now seen corresponding path program 218 times [2021-06-05 14:33:19,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:19,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549043613] [2021-06-05 14:33:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:33:19,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549043613] [2021-06-05 14:33:19,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549043613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079281187] [2021-06-05 14:33:19,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:19,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:19,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:19,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:19,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:19,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:19,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:19,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:19,874 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:19,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:19,885 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:19,889 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:19,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:19,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:19,915 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-06-05 14:33:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:19,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079281187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:19,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:19,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:33:19,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361308005] [2021-06-05 14:33:19,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:19,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:19,982 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:20,526 INFO L93 Difference]: Finished difference Result 202 states and 459 transitions. [2021-06-05 14:33:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:20,526 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:33:20,526 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:33:20,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:33:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2021-06-05 14:33:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.433734939759036) internal successors, (404), 166 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 404 transitions. [2021-06-05 14:33:20,528 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 404 transitions. Word has length 18 [2021-06-05 14:33:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 404 transitions. [2021-06-05 14:33:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 404 transitions. [2021-06-05 14:33:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:20,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:20,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:20,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2733,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:20,733 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash 829289833, now seen corresponding path program 219 times [2021-06-05 14:33:20,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:20,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954328893] [2021-06-05 14:33:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954328893] [2021-06-05 14:33:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954328893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512147855] [2021-06-05 14:33:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:21,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:21,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:21,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:21,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:21,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:21,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:21,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:21,391 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:21,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:21,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:21,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:21,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:21,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:21,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:21,465 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-06-05 14:33:21,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:21,466 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-06-05 14:33:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512147855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:21,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:33:21,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739004] [2021-06-05 14:33:21,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:33:21,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:33:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:21,571 INFO L87 Difference]: Start difference. First operand 167 states and 404 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,664 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:33:22,943 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 14:33:23,450 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-05 14:33:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:23,495 INFO L93 Difference]: Finished difference Result 332 states and 688 transitions. [2021-06-05 14:33:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:33:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:23,496 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:33:23,496 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 14:33:23,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2066.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:33:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 14:33:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 167. [2021-06-05 14:33:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-06-05 14:33:23,499 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-06-05 14:33:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:23,499 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-06-05 14:33:23,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-06-05 14:33:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:23,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:23,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:23,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-06-05 14:33:23,722 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash -907487899, now seen corresponding path program 220 times [2021-06-05 14:33:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:23,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844405435] [2021-06-05 14:33:23,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844405435] [2021-06-05 14:33:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844405435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523716780] [2021-06-05 14:33:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:23,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:24,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:24,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:24,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:24,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:24,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:24,243 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:24,247 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:24,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:24,255 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:24,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:24,263 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:24,266 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:24,294 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-06-05 14:33:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523716780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:24,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:24,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205881547] [2021-06-05 14:33:24,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:24,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:24,397 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:24,854 INFO L93 Difference]: Finished difference Result 213 states and 467 transitions. [2021-06-05 14:33:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:24,855 INFO L225 Difference]: With dead ends: 213 [2021-06-05 14:33:24,855 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 14:33:24,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 14:33:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 167. [2021-06-05 14:33:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-06-05 14:33:24,857 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-06-05 14:33:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:24,857 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-06-05 14:33:24,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-06-05 14:33:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:24,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:24,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:25,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,058 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:25,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2071322093, now seen corresponding path program 221 times [2021-06-05 14:33:25,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:25,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63234961] [2021-06-05 14:33:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63234961] [2021-06-05 14:33:25,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63234961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466852715] [2021-06-05 14:33:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:25,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:25,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:25,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:25,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:25,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:25,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:25,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:25,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-06-05 14:33:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466852715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:25,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:33:25,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721662453] [2021-06-05 14:33:25,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:33:25,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:33:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:25,689 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:26,212 INFO L93 Difference]: Finished difference Result 201 states and 450 transitions. [2021-06-05 14:33:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:26,213 INFO L225 Difference]: With dead ends: 201 [2021-06-05 14:33:26,213 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:33:26,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 786.5ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:33:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:33:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2021-06-05 14:33:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-06-05 14:33:26,215 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-06-05 14:33:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:26,215 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-06-05 14:33:26,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-06-05 14:33:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:26,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:26,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:26,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2872 [2021-06-05 14:33:26,416 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -74848667, now seen corresponding path program 222 times [2021-06-05 14:33:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:26,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668234428] [2021-06-05 14:33:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:26,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668234428] [2021-06-05 14:33:26,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668234428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518668917] [2021-06-05 14:33:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:26,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:26,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:33:27,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:27,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:27,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:27,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:27,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:27,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:27,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:27,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:27,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:33:27,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:27,099 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:27,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,155 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-06-05 14:33:27,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:27,157 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:33:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518668917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:27,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:27,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261233388] [2021-06-05 14:33:27,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:27,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:27,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:27,230 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:27,470 INFO L93 Difference]: Finished difference Result 197 states and 444 transitions. [2021-06-05 14:33:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:27,470 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:33:27,470 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 14:33:27,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 14:33:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2021-06-05 14:33:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4156626506024095) internal successors, (401), 166 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 401 transitions. [2021-06-05 14:33:27,472 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 401 transitions. Word has length 18 [2021-06-05 14:33:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:27,472 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 401 transitions. [2021-06-05 14:33:27,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 401 transitions. [2021-06-05 14:33:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:27,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:27,473 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:27,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2883 [2021-06-05 14:33:27,673 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1795842231, now seen corresponding path program 223 times [2021-06-05 14:33:27,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549086171] [2021-06-05 14:33:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549086171] [2021-06-05 14:33:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549086171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965264382] [2021-06-05 14:33:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:28,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:28,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:28,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:28,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:28,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:28,124 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:28,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,141 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:28,143 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,182 INFO L628 ElimStorePlain]: treesize reduction 51, result has 44.6 percent of original size [2021-06-05 14:33:28,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:28,183 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:364, output treesize:41 [2021-06-05 14:33:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:28,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965264382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:28,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:33:28,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658936651] [2021-06-05 14:33:28,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:28,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:28,246 INFO L87 Difference]: Start difference. First operand 167 states and 401 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:28,461 INFO L93 Difference]: Finished difference Result 190 states and 440 transitions. [2021-06-05 14:33:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:28,462 INFO L225 Difference]: With dead ends: 190 [2021-06-05 14:33:28,462 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:33:28,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:33:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2021-06-05 14:33:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4166666666666665) internal successors, (406), 168 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2021-06-05 14:33:28,464 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 18 [2021-06-05 14:33:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:28,464 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2021-06-05 14:33:28,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2021-06-05 14:33:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:28,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:28,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:28,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-06-05 14:33:28,664 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1384027269, now seen corresponding path program 224 times [2021-06-05 14:33:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:28,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796947413] [2021-06-05 14:33:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:28,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:28,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796947413] [2021-06-05 14:33:28,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796947413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676326355] [2021-06-05 14:33:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:29,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:29,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:29,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:29,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:29,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:29,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:29,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:29,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:29,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:29,215 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:149, output treesize:41 [2021-06-05 14:33:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:29,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676326355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:29,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:33:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649839416] [2021-06-05 14:33:29,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:29,263 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:29,544 INFO L93 Difference]: Finished difference Result 194 states and 448 transitions. [2021-06-05 14:33:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:29,544 INFO L225 Difference]: With dead ends: 194 [2021-06-05 14:33:29,545 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 14:33:29,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 14:33:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-06-05 14:33:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.4201183431952664) internal successors, (409), 169 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 409 transitions. [2021-06-05 14:33:29,546 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 409 transitions. Word has length 18 [2021-06-05 14:33:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:29,546 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 409 transitions. [2021-06-05 14:33:29,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 409 transitions. [2021-06-05 14:33:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:29,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:29,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:29,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,765 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2040793033, now seen corresponding path program 225 times [2021-06-05 14:33:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:29,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125288113] [2021-06-05 14:33:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:30,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125288113] [2021-06-05 14:33:30,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125288113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533380915] [2021-06-05 14:33:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:30,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:30,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:30,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:30,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:30,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:33:30,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:30,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:33:30,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:33:30,696 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:30,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:33:30,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:30,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:30,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:30,734 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:355, output treesize:41 [2021-06-05 14:33:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533380915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:30,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:33:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447041478] [2021-06-05 14:33:30,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:30,806 INFO L87 Difference]: Start difference. First operand 170 states and 409 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,343 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:33:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:31,694 INFO L93 Difference]: Finished difference Result 301 states and 643 transitions. [2021-06-05 14:33:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:33:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:31,695 INFO L225 Difference]: With dead ends: 301 [2021-06-05 14:33:31,695 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 14:33:31,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1343.2ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:33:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 14:33:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 186. [2021-06-05 14:33:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.4486486486486485) internal successors, (453), 185 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 453 transitions. [2021-06-05 14:33:31,697 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 453 transitions. Word has length 18 [2021-06-05 14:33:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:31,697 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 453 transitions. [2021-06-05 14:33:31,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 453 transitions. [2021-06-05 14:33:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:31,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:31,697 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:31,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:31,901 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1646337029, now seen corresponding path program 226 times [2021-06-05 14:33:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714299714] [2021-06-05 14:33:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714299714] [2021-06-05 14:33:32,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714299714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025653920] [2021-06-05 14:33:32,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:32,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:32,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:32,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:32,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:32,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,529 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:33:32,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:32,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:32,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:32,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:32,592 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:33:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:32,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025653920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:32,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:33:32,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26119847] [2021-06-05 14:33:32,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:32,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:32,687 INFO L87 Difference]: Start difference. First operand 186 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,103 INFO L93 Difference]: Finished difference Result 224 states and 512 transitions. [2021-06-05 14:33:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,104 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:33:33,104 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:33:33,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:33:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 187. [2021-06-05 14:33:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4516129032258065) internal successors, (456), 186 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 456 transitions. [2021-06-05 14:33:33,106 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 456 transitions. Word has length 18 [2021-06-05 14:33:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 456 transitions. [2021-06-05 14:33:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 456 transitions. [2021-06-05 14:33:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:33,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,107 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:33,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,307 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash 911852535, now seen corresponding path program 227 times [2021-06-05 14:33:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:33,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991115933] [2021-06-05 14:33:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:33,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:33,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991115933] [2021-06-05 14:33:33,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991115933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993892783] [2021-06-05 14:33:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:33,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:33,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:33,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:33,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:33,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:33,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:33,966 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:115, output treesize:40 [2021-06-05 14:33:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993892783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:33:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404850468] [2021-06-05 14:33:34,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:33:34,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:33:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:34,039 INFO L87 Difference]: Start difference. First operand 187 states and 456 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:34,456 INFO L93 Difference]: Finished difference Result 212 states and 496 transitions. [2021-06-05 14:33:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:34,457 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:33:34,457 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:33:34,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 777.2ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:33:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2021-06-05 14:33:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4516129032258065) internal successors, (456), 186 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 456 transitions. [2021-06-05 14:33:34,459 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 456 transitions. Word has length 18 [2021-06-05 14:33:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:34,459 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 456 transitions. [2021-06-05 14:33:34,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 456 transitions. [2021-06-05 14:33:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:34,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:34,459 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:34,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,660 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash 99107669, now seen corresponding path program 228 times [2021-06-05 14:33:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833292397] [2021-06-05 14:33:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833292397] [2021-06-05 14:33:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833292397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007082097] [2021-06-05 14:33:34,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:34,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:34,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:35,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:35,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:35,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:35,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:35,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:35,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:35,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:35,157 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:33:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:35,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007082097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:35,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:33:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095240987] [2021-06-05 14:33:35,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:35,215 INFO L87 Difference]: Start difference. First operand 187 states and 456 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:35,539 INFO L93 Difference]: Finished difference Result 207 states and 490 transitions. [2021-06-05 14:33:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:35,540 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:33:35,540 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:33:35,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:33:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-06-05 14:33:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.452127659574468) internal successors, (461), 188 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 461 transitions. [2021-06-05 14:33:35,542 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 461 transitions. Word has length 18 [2021-06-05 14:33:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:35,542 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 461 transitions. [2021-06-05 14:33:35,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 461 transitions. [2021-06-05 14:33:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:35,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:35,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:35,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-05 14:33:35,742 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash -557658095, now seen corresponding path program 229 times [2021-06-05 14:33:35,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:35,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472247270] [2021-06-05 14:33:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:35,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:35,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472247270] [2021-06-05 14:33:35,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472247270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159453566] [2021-06-05 14:33:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:36,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:36,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:36,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:36,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:36,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,430 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-06-05 14:33:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:36,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:36,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:36,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:36,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:33:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159453566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:36,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:33:36,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070122369] [2021-06-05 14:33:36,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:33:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:33:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:36,561 INFO L87 Difference]: Start difference. First operand 189 states and 461 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:37,008 INFO L93 Difference]: Finished difference Result 211 states and 498 transitions. [2021-06-05 14:33:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:37,008 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:33:37,008 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:33:37,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:33:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 190. [2021-06-05 14:33:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.455026455026455) internal successors, (464), 189 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 464 transitions. [2021-06-05 14:33:37,010 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 464 transitions. Word has length 18 [2021-06-05 14:33:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:37,010 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 464 transitions. [2021-06-05 14:33:37,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 464 transitions. [2021-06-05 14:33:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:37,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:37,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:37,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 14:33:37,211 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:37,211 INFO L82 PathProgramCache]: Analyzing trace with hash -163202091, now seen corresponding path program 230 times [2021-06-05 14:33:37,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:37,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443391319] [2021-06-05 14:33:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:37,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:37,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443391319] [2021-06-05 14:33:37,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443391319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222182755] [2021-06-05 14:33:37,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:37,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:37,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:37,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:37,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:37,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,944 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:33:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:37,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:37,948 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:37,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:37,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:38,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:38,006 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:33:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222182755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:38,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570084958] [2021-06-05 14:33:38,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:38,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:38,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:38,109 INFO L87 Difference]: Start difference. First operand 190 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:38,566 INFO L93 Difference]: Finished difference Result 224 states and 516 transitions. [2021-06-05 14:33:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:38,566 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:33:38,567 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:33:38,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:33:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-06-05 14:33:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.457894736842105) internal successors, (467), 190 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 467 transitions. [2021-06-05 14:33:38,569 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 467 transitions. Word has length 18 [2021-06-05 14:33:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:38,569 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 467 transitions. [2021-06-05 14:33:38,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 467 transitions. [2021-06-05 14:33:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:38,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:38,570 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:38,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 14:33:38,785 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1899979823, now seen corresponding path program 231 times [2021-06-05 14:33:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435076698] [2021-06-05 14:33:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435076698] [2021-06-05 14:33:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435076698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013422814] [2021-06-05 14:33:38,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:39,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:39,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:39,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:39,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,382 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-06-05 14:33:39,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:39,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:39,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:39,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:39,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:39,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:39,444 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:33:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013422814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:39,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063584142] [2021-06-05 14:33:39,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:39,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:39,552 INFO L87 Difference]: Start difference. First operand 191 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:40,046 INFO L93 Difference]: Finished difference Result 212 states and 500 transitions. [2021-06-05 14:33:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:40,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:40,047 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:33:40,047 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:33:40,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:33:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 190. [2021-06-05 14:33:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.455026455026455) internal successors, (464), 189 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 464 transitions. [2021-06-05 14:33:40,049 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 464 transitions. Word has length 18 [2021-06-05 14:33:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:40,049 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 464 transitions. [2021-06-05 14:33:40,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 464 transitions. [2021-06-05 14:33:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:40,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:40,049 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:40,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3108,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:40,250 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1064004361, now seen corresponding path program 232 times [2021-06-05 14:33:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:40,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421439374] [2021-06-05 14:33:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:40,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:40,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421439374] [2021-06-05 14:33:40,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421439374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506991192] [2021-06-05 14:33:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:40,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:40,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:40,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:40,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:40,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:40,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,977 INFO L628 ElimStorePlain]: treesize reduction 255, result has 22.3 percent of original size [2021-06-05 14:33:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:40,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:41,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:41,034 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:33:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506991192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:41,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372845280] [2021-06-05 14:33:41,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:41,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:41,101 INFO L87 Difference]: Start difference. First operand 190 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,745 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-06-05 14:33:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,746 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:33:41,746 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 14:33:41,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 14:33:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2021-06-05 14:33:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-06-05 14:33:41,748 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-06-05 14:33:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,748 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-06-05 14:33:41,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-06-05 14:33:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:41,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,748 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:41,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,949 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -669548357, now seen corresponding path program 233 times [2021-06-05 14:33:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:41,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538981053] [2021-06-05 14:33:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:42,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538981053] [2021-06-05 14:33:42,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538981053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730397076] [2021-06-05 14:33:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:42,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:42,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:42,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:42,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:42,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:42,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:42,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:42,515 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:33:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730397076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:33:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418567724] [2021-06-05 14:33:42,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:33:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:33:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:42,622 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:43,123 INFO L93 Difference]: Finished difference Result 244 states and 559 transitions. [2021-06-05 14:33:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:43,124 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:33:43,124 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 14:33:43,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 14:33:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2021-06-05 14:33:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-06-05 14:33:43,126 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-06-05 14:33:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-06-05 14:33:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-06-05 14:33:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:43,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:43,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:43,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3159,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,327 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1888641207, now seen corresponding path program 234 times [2021-06-05 14:33:43,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:43,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191038122] [2021-06-05 14:33:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191038122] [2021-06-05 14:33:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191038122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720105725] [2021-06-05 14:33:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:43,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:43,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:43,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:43,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:43,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:43,834 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-06-05 14:33:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720105725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:43,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:33:43,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885478804] [2021-06-05 14:33:43,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:33:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:33:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:43,941 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:44,445 INFO L93 Difference]: Finished difference Result 232 states and 541 transitions. [2021-06-05 14:33:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:44,446 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:33:44,446 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:33:44,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:33:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2021-06-05 14:33:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.475) internal successors, (495), 200 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 495 transitions. [2021-06-05 14:33:44,448 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 495 transitions. Word has length 18 [2021-06-05 14:33:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:44,448 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 495 transitions. [2021-06-05 14:33:44,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 495 transitions. [2021-06-05 14:33:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:44,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:44,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:44,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:44,653 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash -131692779, now seen corresponding path program 235 times [2021-06-05 14:33:44,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:44,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809341943] [2021-06-05 14:33:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:44,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:44,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809341943] [2021-06-05 14:33:44,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809341943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958248208] [2021-06-05 14:33:44,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:45,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:45,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:45,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:33:45,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:45,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:33:45,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:45,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:45,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:45,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:45,389 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:45,394 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:45,398 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:45,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,456 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-06-05 14:33:45,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:45,457 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:440, output treesize:40 [2021-06-05 14:33:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:45,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958248208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:45,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:45,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105188439] [2021-06-05 14:33:45,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:45,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:45,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:45,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:45,567 INFO L87 Difference]: Start difference. First operand 201 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:45,889 INFO L93 Difference]: Finished difference Result 270 states and 613 transitions. [2021-06-05 14:33:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:45,889 INFO L225 Difference]: With dead ends: 270 [2021-06-05 14:33:45,890 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 14:33:45,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 14:33:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 206. [2021-06-05 14:33:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-06-05 14:33:45,892 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-06-05 14:33:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:45,892 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-06-05 14:33:45,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-06-05 14:33:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:45,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:45,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:46,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:46,093 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1868470511, now seen corresponding path program 236 times [2021-06-05 14:33:46,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:46,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692033210] [2021-06-05 14:33:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:46,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692033210] [2021-06-05 14:33:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692033210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71565496] [2021-06-05 14:33:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:46,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:46,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:46,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:46,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:46,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:46,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:46,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:46,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:46,574 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:46,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:46,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:46,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:46,590 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:46,594 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:33:46,598 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:46,601 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:46,604 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,661 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.2 percent of original size [2021-06-05 14:33:46,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:46,663 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-06-05 14:33:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:46,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71565496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:46,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:33:46,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850532756] [2021-06-05 14:33:46,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:46,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:46,762 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:47,222 INFO L93 Difference]: Finished difference Result 296 states and 652 transitions. [2021-06-05 14:33:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:47,222 INFO L225 Difference]: With dead ends: 296 [2021-06-05 14:33:47,222 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 14:33:47,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 14:33:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 206. [2021-06-05 14:33:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-06-05 14:33:47,224 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-06-05 14:33:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:47,225 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-06-05 14:33:47,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-06-05 14:33:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:47,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:47,225 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:47,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-06-05 14:33:47,425 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1110339481, now seen corresponding path program 237 times [2021-06-05 14:33:47,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:47,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826887407] [2021-06-05 14:33:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:47,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:47,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826887407] [2021-06-05 14:33:47,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826887407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379426770] [2021-06-05 14:33:47,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:33:47,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:47,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:33:47,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:47,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:47,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:47,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:33:47,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:47,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:33:47,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:47,968 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:33:47,971 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:47,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:47,997 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-06-05 14:33:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379426770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:33:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449684709] [2021-06-05 14:33:48,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:48,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:48,055 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:48,443 INFO L93 Difference]: Finished difference Result 258 states and 595 transitions. [2021-06-05 14:33:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:48,444 INFO L225 Difference]: With dead ends: 258 [2021-06-05 14:33:48,444 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 14:33:48,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 14:33:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 206. [2021-06-05 14:33:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5073170731707317) internal successors, (514), 205 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 514 transitions. [2021-06-05 14:33:48,446 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 514 transitions. Word has length 18 [2021-06-05 14:33:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:48,446 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 514 transitions. [2021-06-05 14:33:48,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 514 transitions. [2021-06-05 14:33:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:48,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:48,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:48,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 14:33:48,647 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1168349509, now seen corresponding path program 238 times [2021-06-05 14:33:48,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:48,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867620431] [2021-06-05 14:33:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:48,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867620431] [2021-06-05 14:33:48,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867620431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121303132] [2021-06-05 14:33:48,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:48,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:49,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:49,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:49,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:49,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,408 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:33:49,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:49,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:49,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:49,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:49,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:49,469 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:33:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121303132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:49,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:49,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432662043] [2021-06-05 14:33:49,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:49,543 INFO L87 Difference]: Start difference. First operand 206 states and 514 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:50,020 INFO L93 Difference]: Finished difference Result 291 states and 663 transitions. [2021-06-05 14:33:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:50,021 INFO L225 Difference]: With dead ends: 291 [2021-06-05 14:33:50,021 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 14:33:50,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 706.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 14:33:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 218. [2021-06-05 14:33:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.5299539170506913) internal successors, (549), 217 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 549 transitions. [2021-06-05 14:33:50,026 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 549 transitions. Word has length 18 [2021-06-05 14:33:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:50,026 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 549 transitions. [2021-06-05 14:33:50,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 549 transitions. [2021-06-05 14:33:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:50,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:50,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,250 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1825115273, now seen corresponding path program 239 times [2021-06-05 14:33:50,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:50,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407878016] [2021-06-05 14:33:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:50,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407878016] [2021-06-05 14:33:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407878016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726933788] [2021-06-05 14:33:50,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:50,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:50,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:50,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:50,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:50,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:50,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:50,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:50,764 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:124, output treesize:41 [2021-06-05 14:33:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726933788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:50,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:33:50,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485373033] [2021-06-05 14:33:50,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:33:50,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:33:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:50,836 INFO L87 Difference]: Start difference. First operand 218 states and 549 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:51,608 INFO L93 Difference]: Finished difference Result 313 states and 703 transitions. [2021-06-05 14:33:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:33:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:51,609 INFO L225 Difference]: With dead ends: 313 [2021-06-05 14:33:51,609 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 14:33:51,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:33:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 14:33:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 220. [2021-06-05 14:33:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.538812785388128) internal successors, (556), 219 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 556 transitions. [2021-06-05 14:33:51,611 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 556 transitions. Word has length 18 [2021-06-05 14:33:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:51,611 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 556 transitions. [2021-06-05 14:33:51,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 556 transitions. [2021-06-05 14:33:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:51,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:51,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:51,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3370,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,812 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1430659269, now seen corresponding path program 240 times [2021-06-05 14:33:51,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:51,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125457242] [2021-06-05 14:33:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:52,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:52,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125457242] [2021-06-05 14:33:52,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125457242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567914251] [2021-06-05 14:33:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:52,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:52,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:52,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:52,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:33:52,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:52,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:33:52,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:33:52,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:52,478 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:33:52,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:52,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:52,500 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:52,505 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:52,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:52,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:52,516 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:52,520 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:52,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:52,526 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,582 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:33:52,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:52,583 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-06-05 14:33:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:52,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567914251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:52,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:33:52,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375442307] [2021-06-05 14:33:52,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:33:52,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:52,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:33:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:52,707 INFO L87 Difference]: Start difference. First operand 220 states and 556 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,683 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:33:53,819 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 14:33:54,067 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:33:54,184 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:33:54,336 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 14:33:54,495 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 14:33:54,671 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 14:33:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:54,704 INFO L93 Difference]: Finished difference Result 403 states and 867 transitions. [2021-06-05 14:33:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:33:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:54,705 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:33:54,705 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:33:54,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2110.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:33:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:33:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 222. [2021-06-05 14:33:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.5384615384615383) internal successors, (561), 221 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 561 transitions. [2021-06-05 14:33:54,708 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 561 transitions. Word has length 18 [2021-06-05 14:33:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 561 transitions. [2021-06-05 14:33:54,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 561 transitions. [2021-06-05 14:33:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:54,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:54,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-06-05 14:33:54,909 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1127530295, now seen corresponding path program 241 times [2021-06-05 14:33:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013778547] [2021-06-05 14:33:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:55,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013778547] [2021-06-05 14:33:55,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013778547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835353269] [2021-06-05 14:33:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:55,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:55,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:55,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:55,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,631 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:33:55,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:55,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:55,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:55,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:55,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:33:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:55,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835353269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:55,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:33:55,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518248281] [2021-06-05 14:33:55,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:55,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:55,807 INFO L87 Difference]: Start difference. First operand 222 states and 561 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:56,415 INFO L93 Difference]: Finished difference Result 262 states and 621 transitions. [2021-06-05 14:33:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:56,416 INFO L225 Difference]: With dead ends: 262 [2021-06-05 14:33:56,416 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 14:33:56,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 855.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:33:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 14:33:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-06-05 14:33:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.5384615384615383) internal successors, (561), 221 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 561 transitions. [2021-06-05 14:33:56,418 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 561 transitions. Word has length 18 [2021-06-05 14:33:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 561 transitions. [2021-06-05 14:33:56,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 561 transitions. [2021-06-05 14:33:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:56,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:56,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:56,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-06-05 14:33:56,619 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash -848326601, now seen corresponding path program 242 times [2021-06-05 14:33:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:56,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345076178] [2021-06-05 14:33:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345076178] [2021-06-05 14:33:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345076178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141192462] [2021-06-05 14:33:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:56,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:57,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:57,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:33:57,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:33:57,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,302 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:33:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:57,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:57,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:57,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:57,362 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:33:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:57,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141192462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:57,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:33:57,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368956593] [2021-06-05 14:33:57,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:57,415 INFO L87 Difference]: Start difference. First operand 222 states and 561 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:57,836 INFO L93 Difference]: Finished difference Result 290 states and 685 transitions. [2021-06-05 14:33:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:33:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:57,837 INFO L225 Difference]: With dead ends: 290 [2021-06-05 14:33:57,837 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 14:33:57,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 14:33:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 228. [2021-06-05 14:33:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5726872246696035) internal successors, (584), 227 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 584 transitions. [2021-06-05 14:33:57,839 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 584 transitions. Word has length 18 [2021-06-05 14:33:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:57,839 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 584 transitions. [2021-06-05 14:33:57,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 584 transitions. [2021-06-05 14:33:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:33:57,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:57,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:58,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3454 [2021-06-05 14:33:58,040 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash -453870597, now seen corresponding path program 243 times [2021-06-05 14:33:58,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:58,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564095476] [2021-06-05 14:33:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:58,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:58,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564095476] [2021-06-05 14:33:58,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564095476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453445298] [2021-06-05 14:33:58,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:58,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:33:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:33:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:58,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:33:58,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:58,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:33:58,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:33:58,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:58,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:33:58,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:58,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:33:58,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:33:58,645 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:58,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:58,653 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:33:58,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:58,661 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:58,664 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:33:58,667 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,730 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:33:58,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:58,732 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-06-05 14:33:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:58,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453445298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:58,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:33:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033947508] [2021-06-05 14:33:58,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:33:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:33:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:58,839 INFO L87 Difference]: Start difference. First operand 228 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,708 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:33:59,870 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 14:34:00,090 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:34:00,212 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 14:34:00,341 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:34:00,493 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:34:00,637 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 14:34:00,797 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 14:34:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:00,832 INFO L93 Difference]: Finished difference Result 417 states and 898 transitions. [2021-06-05 14:34:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:34:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:00,832 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:34:00,833 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 14:34:00,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2008.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:34:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 14:34:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 233. [2021-06-05 14:34:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5474137931034484) internal successors, (591), 232 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 591 transitions. [2021-06-05 14:34:00,835 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 591 transitions. Word has length 18 [2021-06-05 14:34:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:00,835 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 591 transitions. [2021-06-05 14:34:00,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 591 transitions. [2021-06-05 14:34:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:00,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:00,836 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:01,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:01,041 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2104318967, now seen corresponding path program 244 times [2021-06-05 14:34:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:01,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110824561] [2021-06-05 14:34:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110824561] [2021-06-05 14:34:01,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110824561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992026085] [2021-06-05 14:34:01,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:01,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:01,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:01,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:01,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:01,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,618 INFO L628 ElimStorePlain]: treesize reduction 172, result has 30.9 percent of original size [2021-06-05 14:34:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:01,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:01,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:01,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:01,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:01,682 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:34:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992026085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:01,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:34:01,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201349252] [2021-06-05 14:34:01,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:01,772 INFO L87 Difference]: Start difference. First operand 233 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:02,272 INFO L93 Difference]: Finished difference Result 309 states and 713 transitions. [2021-06-05 14:34:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:02,274 INFO L225 Difference]: With dead ends: 309 [2021-06-05 14:34:02,274 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 14:34:02,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 670.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 14:34:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 235. [2021-06-05 14:34:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.547008547008547) internal successors, (596), 234 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 596 transitions. [2021-06-05 14:34:02,278 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 596 transitions. Word has length 18 [2021-06-05 14:34:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:02,278 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 596 transitions. [2021-06-05 14:34:02,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 596 transitions. [2021-06-05 14:34:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:02,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:02,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:02,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:02,494 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash 83984981, now seen corresponding path program 245 times [2021-06-05 14:34:02,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:02,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716187286] [2021-06-05 14:34:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:34:02,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:02,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716187286] [2021-06-05 14:34:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716187286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511962085] [2021-06-05 14:34:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:02,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:02,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:02,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:02,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:02,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:02,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:02,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:02,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:02,902 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-06-05 14:34:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:03,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511962085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:03,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:03,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:34:03,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806259786] [2021-06-05 14:34:03,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:34:03,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:34:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:03,000 INFO L87 Difference]: Start difference. First operand 235 states and 596 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:03,649 INFO L93 Difference]: Finished difference Result 287 states and 690 transitions. [2021-06-05 14:34:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:03,650 INFO L225 Difference]: With dead ends: 287 [2021-06-05 14:34:03,650 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 14:34:03,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:34:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 14:34:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 243. [2021-06-05 14:34:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-06-05 14:34:03,652 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-06-05 14:34:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:03,652 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-06-05 14:34:03,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-06-05 14:34:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:03,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:03,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:03,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:03,853 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1652792751, now seen corresponding path program 246 times [2021-06-05 14:34:03,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:03,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836132454] [2021-06-05 14:34:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:34:04,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836132454] [2021-06-05 14:34:04,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836132454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576405701] [2021-06-05 14:34:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:04,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:04,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:04,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:04,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:04,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:04,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:04,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:04,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:04,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:04,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,497 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:04,501 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:04,505 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:04,509 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:04,513 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,517 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:04,521 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:04,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:04,548 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:601, output treesize:40 [2021-06-05 14:34:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576405701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:04,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:34:04,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127672000] [2021-06-05 14:34:04,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:04,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:04,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:04,638 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:05,132 INFO L93 Difference]: Finished difference Result 281 states and 671 transitions. [2021-06-05 14:34:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:05,132 INFO L225 Difference]: With dead ends: 281 [2021-06-05 14:34:05,132 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 14:34:05,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 14:34:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 243. [2021-06-05 14:34:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-06-05 14:34:05,135 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-06-05 14:34:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:05,135 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-06-05 14:34:05,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-06-05 14:34:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:05,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:05,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:05,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,336 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:05,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1326017241, now seen corresponding path program 247 times [2021-06-05 14:34:05,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:05,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139162995] [2021-06-05 14:34:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:34:05,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139162995] [2021-06-05 14:34:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139162995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88054663] [2021-06-05 14:34:05,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:05,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:05,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:05,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:05,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:05,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:05,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:05,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:05,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:05,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:05,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:34:05,951 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:05,955 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:05,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:05,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,011 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-06-05 14:34:06,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:06,012 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:34:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88054663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:06,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:34:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71829714] [2021-06-05 14:34:06,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:06,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:06,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:06,077 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:06,618 INFO L93 Difference]: Finished difference Result 272 states and 659 transitions. [2021-06-05 14:34:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:06,619 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:34:06,619 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 14:34:06,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 764.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 14:34:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2021-06-05 14:34:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.5578512396694215) internal successors, (619), 242 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 619 transitions. [2021-06-05 14:34:06,621 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 619 transitions. Word has length 18 [2021-06-05 14:34:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:06,621 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 619 transitions. [2021-06-05 14:34:06,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 619 transitions. [2021-06-05 14:34:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:06,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:06,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:06,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,822 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash -422361285, now seen corresponding path program 248 times [2021-06-05 14:34:06,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:06,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838468468] [2021-06-05 14:34:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838468468] [2021-06-05 14:34:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838468468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504746950] [2021-06-05 14:34:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:07,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:07,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:07,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:07,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:07,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:07,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:07,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:07,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:07,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:34:07,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:07,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:07,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:07,367 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:07,371 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:07,374 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:07,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:07,401 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-06-05 14:34:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504746950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:07,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:34:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203142138] [2021-06-05 14:34:07,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:34:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:34:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:07,517 INFO L87 Difference]: Start difference. First operand 243 states and 619 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:08,004 INFO L93 Difference]: Finished difference Result 289 states and 690 transitions. [2021-06-05 14:34:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:08,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:08,004 INFO L225 Difference]: With dead ends: 289 [2021-06-05 14:34:08,005 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 14:34:08,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 14:34:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 246. [2021-06-05 14:34:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.5673469387755103) internal successors, (629), 245 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 629 transitions. [2021-06-05 14:34:08,007 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 629 transitions. Word has length 18 [2021-06-05 14:34:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:08,007 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 629 transitions. [2021-06-05 14:34:08,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 629 transitions. [2021-06-05 14:34:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:08,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:08,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:08,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3694 [2021-06-05 14:34:08,208 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2135828279, now seen corresponding path program 249 times [2021-06-05 14:34:08,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:08,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741908245] [2021-06-05 14:34:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:08,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741908245] [2021-06-05 14:34:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741908245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509796766] [2021-06-05 14:34:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:08,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:34:08,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:34:08,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:34:08,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:08,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:08,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:08,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:08,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:08,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:08,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:08,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:08,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:08,980 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:34:08,983 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:09,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:09,011 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:488, output treesize:40 [2021-06-05 14:34:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509796766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:09,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:09,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887392974] [2021-06-05 14:34:09,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:09,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:09,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:09,117 INFO L87 Difference]: Start difference. First operand 246 states and 629 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,129 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:34:10,627 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 14:34:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:10,878 INFO L93 Difference]: Finished difference Result 444 states and 995 transitions. [2021-06-05 14:34:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:34:10,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:10,879 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:34:10,879 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:34:10,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1899.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:34:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:34:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 270. [2021-06-05 14:34:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.5985130111524164) internal successors, (699), 269 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 699 transitions. [2021-06-05 14:34:10,882 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 699 transitions. Word has length 18 [2021-06-05 14:34:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:10,882 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 699 transitions. [2021-06-05 14:34:10,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 699 transitions. [2021-06-05 14:34:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:10,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:10,882 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:11,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-06-05 14:34:11,083 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 819670975, now seen corresponding path program 250 times [2021-06-05 14:34:11,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:11,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042098687] [2021-06-05 14:34:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:11,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042098687] [2021-06-05 14:34:11,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042098687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672698165] [2021-06-05 14:34:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:11,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:11,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:11,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:11,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:11,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:11,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:11,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:11,677 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:11,681 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:11,684 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:11,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:11,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:11,714 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-06-05 14:34:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672698165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:11,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277628267] [2021-06-05 14:34:11,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:11,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:11,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:11,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:11,773 INFO L87 Difference]: Start difference. First operand 270 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:12,284 INFO L93 Difference]: Finished difference Result 303 states and 745 transitions. [2021-06-05 14:34:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:12,284 INFO L225 Difference]: With dead ends: 303 [2021-06-05 14:34:12,284 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 14:34:12,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 14:34:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 270. [2021-06-05 14:34:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.5985130111524164) internal successors, (699), 269 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 699 transitions. [2021-06-05 14:34:12,291 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 699 transitions. Word has length 18 [2021-06-05 14:34:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:12,292 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 699 transitions. [2021-06-05 14:34:12,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 699 transitions. [2021-06-05 14:34:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:12,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:12,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:12,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3837 [2021-06-05 14:34:12,515 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1326499785, now seen corresponding path program 251 times [2021-06-05 14:34:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:12,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850243838] [2021-06-05 14:34:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850243838] [2021-06-05 14:34:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850243838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340731630] [2021-06-05 14:34:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:12,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:12,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:12,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:13,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:13,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:13,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:13,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,233 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:13,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:13,234 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:34:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340731630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:13,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747127249] [2021-06-05 14:34:13,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:13,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:13,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:13,306 INFO L87 Difference]: Start difference. First operand 270 states and 699 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:13,857 INFO L93 Difference]: Finished difference Result 350 states and 826 transitions. [2021-06-05 14:34:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:13,857 INFO L225 Difference]: With dead ends: 350 [2021-06-05 14:34:13,858 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:34:13,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:34:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 275. [2021-06-05 14:34:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.605839416058394) internal successors, (714), 274 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 714 transitions. [2021-06-05 14:34:13,860 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 714 transitions. Word has length 18 [2021-06-05 14:34:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:13,860 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 714 transitions. [2021-06-05 14:34:13,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 714 transitions. [2021-06-05 14:34:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:13,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:13,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:14,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:14,061 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1804816363, now seen corresponding path program 252 times [2021-06-05 14:34:14,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:14,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945962578] [2021-06-05 14:34:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:14,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:14,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945962578] [2021-06-05 14:34:14,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945962578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:14,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252283408] [2021-06-05 14:34:14,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:14,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:14,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:14,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:14,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:14,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:14,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:34:14,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:14,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:34:14,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:34:14,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:14,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:14,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:14,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:14,858 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:14,862 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:14,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:14,870 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:14,873 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:34:14,876 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,928 INFO L628 ElimStorePlain]: treesize reduction 21, result has 73.8 percent of original size [2021-06-05 14:34:14,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:14,930 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:641, output treesize:41 [2021-06-05 14:34:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252283408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:34:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942263390] [2021-06-05 14:34:15,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:34:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:34:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:15,001 INFO L87 Difference]: Start difference. First operand 275 states and 714 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:15,386 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 14:34:16,285 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:34:16,547 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:34:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:16,739 INFO L93 Difference]: Finished difference Result 484 states and 1089 transitions. [2021-06-05 14:34:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:34:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:16,739 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:34:16,739 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:34:16,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1780.2ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:34:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:34:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 294. [2021-06-05 14:34:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.651877133105802) internal successors, (777), 293 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 777 transitions. [2021-06-05 14:34:16,743 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 777 transitions. Word has length 18 [2021-06-05 14:34:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:16,743 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 777 transitions. [2021-06-05 14:34:16,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 777 transitions. [2021-06-05 14:34:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:16,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:16,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:16,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:16,944 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1833385169, now seen corresponding path program 253 times [2021-06-05 14:34:16,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:16,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637195381] [2021-06-05 14:34:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:17,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:17,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637195381] [2021-06-05 14:34:17,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637195381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739797626] [2021-06-05 14:34:17,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:17,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:17,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:17,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:17,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:17,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:17,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:34:17,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:17,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:17,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:17,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:17,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:17,503 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:17,506 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:17,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:17,533 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:444, output treesize:41 [2021-06-05 14:34:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739797626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:34:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546805936] [2021-06-05 14:34:17,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:34:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:34:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:17,599 INFO L87 Difference]: Start difference. First operand 294 states and 777 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:18,294 INFO L93 Difference]: Finished difference Result 417 states and 981 transitions. [2021-06-05 14:34:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:34:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:18,295 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:34:18,295 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 14:34:18,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 14:34:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 296. [2021-06-05 14:34:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.6542372881355933) internal successors, (783), 295 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 783 transitions. [2021-06-05 14:34:18,298 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 783 transitions. Word has length 18 [2021-06-05 14:34:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:18,298 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 783 transitions. [2021-06-05 14:34:18,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 783 transitions. [2021-06-05 14:34:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:18,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:18,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:18,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:18,499 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2067126123, now seen corresponding path program 254 times [2021-06-05 14:34:18,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:18,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222222895] [2021-06-05 14:34:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:18,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222222895] [2021-06-05 14:34:18,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222222895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674809053] [2021-06-05 14:34:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:18,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:19,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:19,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:19,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:19,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:19,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:19,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:19,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:19,058 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:19,062 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:19,068 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:19,073 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:19,077 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:19,081 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:19,084 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:19,088 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:19,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:19,091 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:19,147 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:34:19,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:19,149 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-06-05 14:34:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:19,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674809053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:19,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:19,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378381328] [2021-06-05 14:34:19,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:19,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:19,252 INFO L87 Difference]: Start difference. First operand 296 states and 783 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:19,915 INFO L93 Difference]: Finished difference Result 403 states and 962 transitions. [2021-06-05 14:34:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:19,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:19,916 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:34:19,916 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 14:34:19,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 14:34:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 299. [2021-06-05 14:34:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.664429530201342) internal successors, (794), 298 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 794 transitions. [2021-06-05 14:34:19,919 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 794 transitions. Word has length 18 [2021-06-05 14:34:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:19,919 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 794 transitions. [2021-06-05 14:34:19,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 794 transitions. [2021-06-05 14:34:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:19,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:19,920 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:20,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 14:34:20,121 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 491063441, now seen corresponding path program 255 times [2021-06-05 14:34:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:20,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782864537] [2021-06-05 14:34:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:20,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782864537] [2021-06-05 14:34:20,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782864537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223133678] [2021-06-05 14:34:20,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:20,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:20,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:20,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:20,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:34:20,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:20,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:20,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:20,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:20,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:34:20,735 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:34:20,739 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:20,742 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:20,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:20,771 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:352, output treesize:40 [2021-06-05 14:34:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223133678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:20,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:34:20,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473337646] [2021-06-05 14:34:20,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:34:20,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:20,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:34:20,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:20,877 INFO L87 Difference]: Start difference. First operand 299 states and 794 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,841 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 14:34:22,318 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 14:34:22,790 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 14:34:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:22,842 INFO L93 Difference]: Finished difference Result 441 states and 1013 transitions. [2021-06-05 14:34:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:34:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:22,842 INFO L225 Difference]: With dead ends: 441 [2021-06-05 14:34:22,842 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:34:22,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2006.8ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:34:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:34:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 296. [2021-06-05 14:34:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.6271186440677967) internal successors, (775), 295 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 775 transitions. [2021-06-05 14:34:22,846 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 775 transitions. Word has length 18 [2021-06-05 14:34:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:22,846 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 775 transitions. [2021-06-05 14:34:22,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 775 transitions. [2021-06-05 14:34:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:22,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:22,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:23,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:23,053 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2035616811, now seen corresponding path program 256 times [2021-06-05 14:34:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177018289] [2021-06-05 14:34:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:23,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177018289] [2021-06-05 14:34:23,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177018289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461742158] [2021-06-05 14:34:23,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:23,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:23,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:23,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:23,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:23,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,685 INFO L628 ElimStorePlain]: treesize reduction 160, result has 32.5 percent of original size [2021-06-05 14:34:23,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:23,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:23,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:23,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:23,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:23,748 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:34:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461742158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:23,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:34:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47245146] [2021-06-05 14:34:23,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:23,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:23,846 INFO L87 Difference]: Start difference. First operand 296 states and 775 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:24,229 INFO L93 Difference]: Finished difference Result 365 states and 891 transitions. [2021-06-05 14:34:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:24,230 INFO L225 Difference]: With dead ends: 365 [2021-06-05 14:34:24,230 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:34:24,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:34:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 300. [2021-06-05 14:34:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-06-05 14:34:24,233 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-06-05 14:34:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:24,233 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-06-05 14:34:24,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-06-05 14:34:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:24,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:24,233 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:24,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-05 14:34:24,434 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:24,434 INFO L82 PathProgramCache]: Analyzing trace with hash 522572753, now seen corresponding path program 257 times [2021-06-05 14:34:24,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:24,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360999498] [2021-06-05 14:34:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:24,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360999498] [2021-06-05 14:34:24,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360999498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421746067] [2021-06-05 14:34:24,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:24,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:24,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:24,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:24,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:24,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:24,983 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:34:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:25,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421746067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:25,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:34:25,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133414611] [2021-06-05 14:34:25,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:34:25,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:34:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:25,083 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:25,576 INFO L93 Difference]: Finished difference Result 376 states and 904 transitions. [2021-06-05 14:34:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:25,577 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:34:25,577 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:34:25,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 684.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:34:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 300. [2021-06-05 14:34:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-06-05 14:34:25,580 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-06-05 14:34:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:25,580 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-06-05 14:34:25,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-06-05 14:34:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:25,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:25,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:25,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:25,781 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash -793584551, now seen corresponding path program 258 times [2021-06-05 14:34:25,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:25,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025224737] [2021-06-05 14:34:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025224737] [2021-06-05 14:34:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025224737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789510610] [2021-06-05 14:34:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:26,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:26,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:26,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:26,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:26,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,268 INFO L628 ElimStorePlain]: treesize reduction 15, result has 73.2 percent of original size [2021-06-05 14:34:26,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:26,269 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:124, output treesize:41 [2021-06-05 14:34:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789510610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:26,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:34:26,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383955188] [2021-06-05 14:34:26,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:34:26,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:34:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:26,326 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:26,795 INFO L93 Difference]: Finished difference Result 357 states and 876 transitions. [2021-06-05 14:34:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:26,796 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:34:26,796 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 14:34:26,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 14:34:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 300. [2021-06-05 14:34:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6387959866220734) internal successors, (789), 299 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 789 transitions. [2021-06-05 14:34:26,800 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 789 transitions. Word has length 18 [2021-06-05 14:34:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:26,800 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 789 transitions. [2021-06-05 14:34:26,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 789 transitions. [2021-06-05 14:34:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:26,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:26,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:27,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,023 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:27,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1484793455, now seen corresponding path program 259 times [2021-06-05 14:34:27,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:27,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819389810] [2021-06-05 14:34:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:27,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819389810] [2021-06-05 14:34:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819389810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535104819] [2021-06-05 14:34:27,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:27,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:27,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:27,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:27,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:27,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:27,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:27,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:27,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:27,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:27,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:27,660 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:27,664 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:27,668 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:27,671 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:27,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:27,698 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-06-05 14:34:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:27,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535104819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:27,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:34:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888961554] [2021-06-05 14:34:27,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:27,761 INFO L87 Difference]: Start difference. First operand 300 states and 789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:28,101 INFO L93 Difference]: Finished difference Result 372 states and 909 transitions. [2021-06-05 14:34:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:28,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:28,101 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:34:28,101 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:34:28,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:34:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2021-06-05 14:34:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.64) internal successors, (792), 300 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 792 transitions. [2021-06-05 14:34:28,105 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 792 transitions. Word has length 18 [2021-06-05 14:34:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:28,105 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 792 transitions. [2021-06-05 14:34:28,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 792 transitions. [2021-06-05 14:34:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:28,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:28,105 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:28,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,305 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1090337451, now seen corresponding path program 260 times [2021-06-05 14:34:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:28,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717131871] [2021-06-05 14:34:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717131871] [2021-06-05 14:34:28,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717131871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310356484] [2021-06-05 14:34:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:28,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:28,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:28,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:28,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:28,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:28,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:28,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:28,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:28,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:28,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:28,812 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:28,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:28,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:28,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:28,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:28,851 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-06-05 14:34:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310356484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:28,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:34:28,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307747266] [2021-06-05 14:34:28,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:28,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:28,941 INFO L87 Difference]: Start difference. First operand 301 states and 792 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:29,245 INFO L93 Difference]: Finished difference Result 385 states and 934 transitions. [2021-06-05 14:34:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:29,246 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:34:29,246 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:34:29,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:34:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 303. [2021-06-05 14:34:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6490066225165565) internal successors, (800), 302 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 800 transitions. [2021-06-05 14:34:29,249 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 800 transitions. Word has length 18 [2021-06-05 14:34:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:29,249 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 800 transitions. [2021-06-05 14:34:29,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 800 transitions. [2021-06-05 14:34:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:29,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:29,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,450 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1467852113, now seen corresponding path program 261 times [2021-06-05 14:34:29,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216183198] [2021-06-05 14:34:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:29,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216183198] [2021-06-05 14:34:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216183198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949458871] [2021-06-05 14:34:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:29,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:29,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:29,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:29,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:34:30,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:34:30,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:30,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:34:30,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:30,018 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:30,022 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:30,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:30,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,040 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:30,045 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:30,048 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,051 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:30,055 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,111 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:34:30,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:30,112 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-06-05 14:34:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949458871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:30,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:34:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498177305] [2021-06-05 14:34:30,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:34:30,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:34:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:30,214 INFO L87 Difference]: Start difference. First operand 303 states and 800 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,998 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:34:31,169 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 14:34:31,382 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:34:31,515 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:34:31,633 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:34:31,800 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 14:34:31,950 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:34:32,152 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 14:34:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:32,191 INFO L93 Difference]: Finished difference Result 495 states and 1126 transitions. [2021-06-05 14:34:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:34:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:32,192 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:34:32,192 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:34:32,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2018.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:34:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:34:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 305. [2021-06-05 14:34:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-06-05 14:34:32,196 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-06-05 14:34:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:32,196 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-06-05 14:34:32,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-06-05 14:34:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:32,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:32,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:32,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4295 [2021-06-05 14:34:32,396 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2005707691, now seen corresponding path program 262 times [2021-06-05 14:34:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121329198] [2021-06-05 14:34:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:34:32,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121329198] [2021-06-05 14:34:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121329198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234165012] [2021-06-05 14:34:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:32,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:32,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:32,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:32,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:32,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:32,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:32,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:32,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,922 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-06-05 14:34:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:32,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:32,984 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:34:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234165012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:34:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052820451] [2021-06-05 14:34:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:33,080 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:33,702 INFO L93 Difference]: Finished difference Result 350 states and 870 transitions. [2021-06-05 14:34:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:33,703 INFO L225 Difference]: With dead ends: 350 [2021-06-05 14:34:33,703 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:34:33,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 804.2ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:34:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 305. [2021-06-05 14:34:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-06-05 14:34:33,706 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-06-05 14:34:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:33,706 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-06-05 14:34:33,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-06-05 14:34:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:33,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:33,706 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4343 [2021-06-05 14:34:33,907 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash 689550387, now seen corresponding path program 263 times [2021-06-05 14:34:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279114790] [2021-06-05 14:34:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:34:34,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279114790] [2021-06-05 14:34:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279114790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267092004] [2021-06-05 14:34:34,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:34,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:34,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:34,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:34,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:34,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:34,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:34,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,414 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:34,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:34,415 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-06-05 14:34:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267092004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:34,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:34:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539806237] [2021-06-05 14:34:34,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:34:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:34:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:34,470 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:35,045 INFO L93 Difference]: Finished difference Result 341 states and 858 transitions. [2021-06-05 14:34:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:35,046 INFO L225 Difference]: With dead ends: 341 [2021-06-05 14:34:35,046 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 14:34:35,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 798.4ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 14:34:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 305. [2021-06-05 14:34:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6546052631578947) internal successors, (807), 304 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 807 transitions. [2021-06-05 14:34:35,049 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 807 transitions. Word has length 18 [2021-06-05 14:34:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:35,049 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 807 transitions. [2021-06-05 14:34:35,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 807 transitions. [2021-06-05 14:34:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:35,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:35,049 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:35,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,250 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1058828139, now seen corresponding path program 264 times [2021-06-05 14:34:35,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:35,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494121310] [2021-06-05 14:34:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494121310] [2021-06-05 14:34:35,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494121310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39382897] [2021-06-05 14:34:35,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:35,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:35,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:35,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:35,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:35,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,973 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:34:35,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:35,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:36,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:36,008 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:36,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:36,036 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:34:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:36,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39382897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:36,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:34:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192313198] [2021-06-05 14:34:36,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:34:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:34:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:36,139 INFO L87 Difference]: Start difference. First operand 305 states and 807 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:36,812 INFO L93 Difference]: Finished difference Result 361 states and 892 transitions. [2021-06-05 14:34:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:34:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:36,813 INFO L225 Difference]: With dead ends: 361 [2021-06-05 14:34:36,813 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:34:36,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 961.1ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:34:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 307. [2021-06-05 14:34:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.6601307189542482) internal successors, (814), 306 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 814 transitions. [2021-06-05 14:34:36,816 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 814 transitions. Word has length 18 [2021-06-05 14:34:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:36,816 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 814 transitions. [2021-06-05 14:34:36,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 814 transitions. [2021-06-05 14:34:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:36,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:36,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:37,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-06-05 14:34:37,017 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1499361425, now seen corresponding path program 265 times [2021-06-05 14:34:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:37,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052661368] [2021-06-05 14:34:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052661368] [2021-06-05 14:34:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052661368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415646088] [2021-06-05 14:34:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:37,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:37,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:37,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:37,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:37,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,738 INFO L628 ElimStorePlain]: treesize reduction 240, result has 22.6 percent of original size [2021-06-05 14:34:37,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:37,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:37,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:37,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:37,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:37,801 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:34:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415646088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:37,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:37,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258456023] [2021-06-05 14:34:37,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:37,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:37,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:37,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:37,893 INFO L87 Difference]: Start difference. First operand 307 states and 814 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:38,588 INFO L93 Difference]: Finished difference Result 367 states and 900 transitions. [2021-06-05 14:34:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:34:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:38,589 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:34:38,589 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:34:38,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:34:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 306. [2021-06-05 14:34:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6557377049180326) internal successors, (810), 305 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 810 transitions. [2021-06-05 14:34:38,592 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 810 transitions. Word has length 18 [2021-06-05 14:34:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:38,592 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 810 transitions. [2021-06-05 14:34:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 810 transitions. [2021-06-05 14:34:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:38,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:38,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:38,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,793 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash 183204121, now seen corresponding path program 266 times [2021-06-05 14:34:38,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:38,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122791075] [2021-06-05 14:34:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122791075] [2021-06-05 14:34:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122791075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423015617] [2021-06-05 14:34:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:39,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:39,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:39,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:39,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:39,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:39,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,647 INFO L628 ElimStorePlain]: treesize reduction 251, result has 22.0 percent of original size [2021-06-05 14:34:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:39,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:39,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:39,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:39,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:39,705 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-06-05 14:34:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423015617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:39,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:34:39,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087627074] [2021-06-05 14:34:39,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:34:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:34:39,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:39,774 INFO L87 Difference]: Start difference. First operand 306 states and 810 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:40,420 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2021-06-05 14:34:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:40,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:40,421 INFO L225 Difference]: With dead ends: 350 [2021-06-05 14:34:40,421 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:34:40,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1037.6ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:34:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 306. [2021-06-05 14:34:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6557377049180326) internal successors, (810), 305 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 810 transitions. [2021-06-05 14:34:40,424 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 810 transitions. Word has length 18 [2021-06-05 14:34:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:40,424 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 810 transitions. [2021-06-05 14:34:40,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 810 transitions. [2021-06-05 14:34:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:40,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:40,424 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:40,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:40,625 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1542716663, now seen corresponding path program 267 times [2021-06-05 14:34:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:40,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743598345] [2021-06-05 14:34:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:40,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:40,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743598345] [2021-06-05 14:34:40,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743598345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:40,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906715387] [2021-06-05 14:34:40,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:40,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:34:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:34:41,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:41,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:41,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:41,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:34:41,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:34:41,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:34:41,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:34:41,159 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:34:41,163 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:41,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:41,192 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:355, output treesize:41 [2021-06-05 14:34:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906715387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:34:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794230927] [2021-06-05 14:34:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:34:41,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:34:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:41,265 INFO L87 Difference]: Start difference. First operand 306 states and 810 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,669 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:34:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:42,602 INFO L93 Difference]: Finished difference Result 486 states and 1137 transitions. [2021-06-05 14:34:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:34:42,603 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:42,603 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:34:42,603 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:34:42,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1289.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:34:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:34:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 316. [2021-06-05 14:34:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6698412698412697) internal successors, (841), 315 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 841 transitions. [2021-06-05 14:34:42,607 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 841 transitions. Word has length 18 [2021-06-05 14:34:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:42,607 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 841 transitions. [2021-06-05 14:34:42,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 841 transitions. [2021-06-05 14:34:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:42,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:42,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:42,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,808 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1937172667, now seen corresponding path program 268 times [2021-06-05 14:34:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:42,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380455847] [2021-06-05 14:34:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:43,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380455847] [2021-06-05 14:34:43,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380455847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775026723] [2021-06-05 14:34:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:43,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:43,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:34:43,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:43,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:43,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:43,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:43,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:34:43,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:43,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:43,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:43,450 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:34:43,454 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:43,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:43,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:43,485 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-06-05 14:34:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775026723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:43,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:43,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27129417] [2021-06-05 14:34:43,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:43,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:43,589 INFO L87 Difference]: Start difference. First operand 316 states and 841 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:43,908 INFO L93 Difference]: Finished difference Result 418 states and 1010 transitions. [2021-06-05 14:34:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:43,909 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:34:43,909 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 14:34:43,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 14:34:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 322. [2021-06-05 14:34:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6791277258566977) internal successors, (860), 321 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 860 transitions. [2021-06-05 14:34:43,912 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 860 transitions. Word has length 18 [2021-06-05 14:34:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:43,912 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 860 transitions. [2021-06-05 14:34:43,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 860 transitions. [2021-06-05 14:34:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:43,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:43,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:44,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4490 [2021-06-05 14:34:44,113 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash 200394935, now seen corresponding path program 269 times [2021-06-05 14:34:44,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:44,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123012156] [2021-06-05 14:34:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:44,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:44,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123012156] [2021-06-05 14:34:44,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123012156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404574861] [2021-06-05 14:34:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:44,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:44,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:44,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:44,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:44,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:44,634 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-06-05 14:34:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404574861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:44,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343197609] [2021-06-05 14:34:44,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:44,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:44,731 INFO L87 Difference]: Start difference. First operand 322 states and 860 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:45,303 INFO L93 Difference]: Finished difference Result 412 states and 1001 transitions. [2021-06-05 14:34:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:45,303 INFO L225 Difference]: With dead ends: 412 [2021-06-05 14:34:45,303 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 14:34:45,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 14:34:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 320. [2021-06-05 14:34:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6802507836990594) internal successors, (855), 319 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 855 transitions. [2021-06-05 14:34:45,307 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 855 transitions. Word has length 18 [2021-06-05 14:34:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:45,307 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 855 transitions. [2021-06-05 14:34:45,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 855 transitions. [2021-06-05 14:34:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:45,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:45,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:45,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-06-05 14:34:45,507 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1819939051, now seen corresponding path program 270 times [2021-06-05 14:34:45,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:45,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781347624] [2021-06-05 14:34:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:45,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781347624] [2021-06-05 14:34:45,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781347624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427354948] [2021-06-05 14:34:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:45,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:45,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:45,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:45,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:45,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:45,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-06-05 14:34:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427354948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:46,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739034318] [2021-06-05 14:34:46,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:46,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:46,027 INFO L87 Difference]: Start difference. First operand 320 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:46,461 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-06-05 14:34:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:46,462 INFO L225 Difference]: With dead ends: 370 [2021-06-05 14:34:46,462 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:34:46,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:34:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 320. [2021-06-05 14:34:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-06-05 14:34:46,465 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-06-05 14:34:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:46,465 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-06-05 14:34:46,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-06-05 14:34:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:46,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:46,465 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:46,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4573 [2021-06-05 14:34:46,666 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:46,666 INFO L82 PathProgramCache]: Analyzing trace with hash 738250513, now seen corresponding path program 271 times [2021-06-05 14:34:46,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:46,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991829167] [2021-06-05 14:34:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:46,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991829167] [2021-06-05 14:34:46,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991829167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111420887] [2021-06-05 14:34:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:47,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:47,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:47,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:47,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,184 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:34:47,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:47,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:47,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:47,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:47,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:47,249 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:34:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:47,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111420887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:47,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:34:47,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034700871] [2021-06-05 14:34:47,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:47,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:47,347 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:47,902 INFO L93 Difference]: Finished difference Result 373 states and 931 transitions. [2021-06-05 14:34:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:47,903 INFO L225 Difference]: With dead ends: 373 [2021-06-05 14:34:47,903 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:34:47,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:34:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 320. [2021-06-05 14:34:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-06-05 14:34:47,906 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-06-05 14:34:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:47,906 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-06-05 14:34:47,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-06-05 14:34:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:47,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:47,906 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:48,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-06-05 14:34:48,107 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -577906791, now seen corresponding path program 272 times [2021-06-05 14:34:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:48,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394345362] [2021-06-05 14:34:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394345362] [2021-06-05 14:34:48,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394345362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078573315] [2021-06-05 14:34:48,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:48,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:48,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:48,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:34:48,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:34:48,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,769 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-06-05 14:34:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:48,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:48,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:48,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:48,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:48,829 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:34:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078573315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:48,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820060516] [2021-06-05 14:34:48,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:48,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:48,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:48,892 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:49,468 INFO L93 Difference]: Finished difference Result 362 states and 916 transitions. [2021-06-05 14:34:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:49,468 INFO L225 Difference]: With dead ends: 362 [2021-06-05 14:34:49,468 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 14:34:49,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 14:34:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 320. [2021-06-05 14:34:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.677115987460815) internal successors, (854), 319 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 854 transitions. [2021-06-05 14:34:49,471 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 854 transitions. Word has length 18 [2021-06-05 14:34:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:49,471 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 854 transitions. [2021-06-05 14:34:49,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 854 transitions. [2021-06-05 14:34:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:49,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:49,472 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:49,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,672 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1968681979, now seen corresponding path program 273 times [2021-06-05 14:34:49,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:49,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889746516] [2021-06-05 14:34:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889746516] [2021-06-05 14:34:49,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889746516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297321433] [2021-06-05 14:34:49,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:50,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:34:50,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:34:50,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:34:50,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,426 INFO L628 ElimStorePlain]: treesize reduction 178, result has 30.2 percent of original size [2021-06-05 14:34:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:50,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-05 14:34:50,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:50,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:50,497 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:358, output treesize:40 [2021-06-05 14:34:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:50,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297321433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:50,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:34:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209412210] [2021-06-05 14:34:50,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:34:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:34:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:50,598 INFO L87 Difference]: Start difference. First operand 320 states and 854 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:51,094 INFO L93 Difference]: Finished difference Result 352 states and 901 transitions. [2021-06-05 14:34:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:51,095 INFO L225 Difference]: With dead ends: 352 [2021-06-05 14:34:51,095 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 14:34:51,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 14:34:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 321. [2021-06-05 14:34:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.675) internal successors, (856), 320 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 856 transitions. [2021-06-05 14:34:51,098 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 856 transitions. Word has length 18 [2021-06-05 14:34:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:51,098 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 856 transitions. [2021-06-05 14:34:51,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 856 transitions. [2021-06-05 14:34:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:51,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:51,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:51,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4632,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,299 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 231904247, now seen corresponding path program 274 times [2021-06-05 14:34:51,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:51,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739119193] [2021-06-05 14:34:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:51,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:51,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739119193] [2021-06-05 14:34:51,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739119193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968746872] [2021-06-05 14:34:51,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:34:51,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:51,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:34:51,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:51,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,855 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:34:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:51,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:51,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:51,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:51,918 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:34:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:52,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968746872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:52,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:34:52,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252235134] [2021-06-05 14:34:52,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:52,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:52,030 INFO L87 Difference]: Start difference. First operand 321 states and 856 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:52,485 INFO L93 Difference]: Finished difference Result 350 states and 902 transitions. [2021-06-05 14:34:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:52,486 INFO L225 Difference]: With dead ends: 350 [2021-06-05 14:34:52,486 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:34:52,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:34:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2021-06-05 14:34:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 14:34:52,493 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-06-05 14:34:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:52,493 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 14:34:52,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 14:34:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:52,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:52,493 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:52,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4656,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,694 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1084253057, now seen corresponding path program 275 times [2021-06-05 14:34:52,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:52,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367936307] [2021-06-05 14:34:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:52,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367936307] [2021-06-05 14:34:52,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367936307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413899762] [2021-06-05 14:34:52,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:53,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:53,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:53,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:53,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:53,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:53,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:53,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,339 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:53,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:53,340 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-06-05 14:34:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413899762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:53,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342688186] [2021-06-05 14:34:53,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:53,405 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:53,743 INFO L93 Difference]: Finished difference Result 341 states and 890 transitions. [2021-06-05 14:34:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:53,744 INFO L225 Difference]: With dead ends: 341 [2021-06-05 14:34:53,744 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 14:34:53,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 14:34:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2021-06-05 14:34:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 14:34:53,747 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-06-05 14:34:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:53,747 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 14:34:53,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 14:34:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:53,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:53,747 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:53,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4680 [2021-06-05 14:34:53,948 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1064543479, now seen corresponding path program 276 times [2021-06-05 14:34:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:53,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978962534] [2021-06-05 14:34:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:54,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978962534] [2021-06-05 14:34:54,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978962534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79425389] [2021-06-05 14:34:54,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:54,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:34:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:54,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:54,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:54,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:54,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:54,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,509 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:54,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:54,509 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:120, output treesize:41 [2021-06-05 14:34:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79425389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:54,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:34:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898585001] [2021-06-05 14:34:54,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:34:54,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:34:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:54,575 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:54,883 INFO L93 Difference]: Finished difference Result 339 states and 887 transitions. [2021-06-05 14:34:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:54,883 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:34:54,883 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:34:54,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:34:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 324. [2021-06-05 14:34:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 14:34:54,886 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 18 [2021-06-05 14:34:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:54,886 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 14:34:54,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 14:34:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:54,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:54,887 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:55,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,087 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash -843150379, now seen corresponding path program 277 times [2021-06-05 14:34:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:55,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267684240] [2021-06-05 14:34:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:55,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267684240] [2021-06-05 14:34:55,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267684240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518596248] [2021-06-05 14:34:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:55,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:55,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:55,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:55,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:55,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:55,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:55,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,502 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 14:34:55,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:55,503 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:146, output treesize:40 [2021-06-05 14:34:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518596248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:55,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:34:55,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138461955] [2021-06-05 14:34:55,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:55,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:55,591 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:55,892 INFO L93 Difference]: Finished difference Result 357 states and 918 transitions. [2021-06-05 14:34:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:55,893 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:34:55,893 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 14:34:55,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 14:34:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 328. [2021-06-05 14:34:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-06-05 14:34:55,896 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-06-05 14:34:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:55,896 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-06-05 14:34:55,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-06-05 14:34:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:55,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:55,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:56,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,097 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1715039185, now seen corresponding path program 278 times [2021-06-05 14:34:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:56,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856809391] [2021-06-05 14:34:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856809391] [2021-06-05 14:34:56,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856809391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106509504] [2021-06-05 14:34:56,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:56,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:56,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:56,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:56,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,647 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:56,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:56,652 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:56,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:56,670 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:267, output treesize:40 [2021-06-05 14:34:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106509504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:56,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:34:56,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722329775] [2021-06-05 14:34:56,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:56,772 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:57,129 INFO L93 Difference]: Finished difference Result 356 states and 917 transitions. [2021-06-05 14:34:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:57,129 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:34:57,129 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 14:34:57,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 14:34:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 328. [2021-06-05 14:34:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-06-05 14:34:57,133 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-06-05 14:34:57,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:57,133 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-06-05 14:34:57,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,133 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-06-05 14:34:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:57,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:57,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:57,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4709 [2021-06-05 14:34:57,345 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash 398881881, now seen corresponding path program 279 times [2021-06-05 14:34:57,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:57,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146503906] [2021-06-05 14:34:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:57,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146503906] [2021-06-05 14:34:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146503906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311986605] [2021-06-05 14:34:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:57,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:57,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:57,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:57,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:57,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,853 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:57,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:57,854 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:96, output treesize:41 [2021-06-05 14:34:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:57,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311986605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:57,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:34:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271058689] [2021-06-05 14:34:57,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:57,910 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:58,258 INFO L93 Difference]: Finished difference Result 347 states and 905 transitions. [2021-06-05 14:34:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:58,258 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:34:58,258 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:34:58,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 560.3ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:34:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2021-06-05 14:34:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-06-05 14:34:58,261 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-06-05 14:34:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:58,261 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-06-05 14:34:58,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-06-05 14:34:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:58,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:58,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:58,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,462 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1747288879, now seen corresponding path program 280 times [2021-06-05 14:34:58,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:58,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812884291] [2021-06-05 14:34:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:58,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812884291] [2021-06-05 14:34:58,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812884291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419809517] [2021-06-05 14:34:58,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:58,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:59,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:59,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:59,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,041 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:34:59,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:59,042 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:41 [2021-06-05 14:34:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419809517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:59,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:34:59,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797098458] [2021-06-05 14:34:59,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:59,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:59,104 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:59,358 INFO L93 Difference]: Finished difference Result 347 states and 905 transitions. [2021-06-05 14:34:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:34:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:59,359 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:34:59,359 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:34:59,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:34:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2021-06-05 14:34:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.6819571865443423) internal successors, (877), 327 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 877 transitions. [2021-06-05 14:34:59,362 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 877 transitions. Word has length 18 [2021-06-05 14:34:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:59,362 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 877 transitions. [2021-06-05 14:34:59,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 877 transitions. [2021-06-05 14:34:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:34:59,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:59,363 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:59,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4732,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,563 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:59,563 INFO L82 PathProgramCache]: Analyzing trace with hash 440894297, now seen corresponding path program 281 times [2021-06-05 14:34:59,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:59,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507472649] [2021-06-05 14:34:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:59,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507472649] [2021-06-05 14:34:59,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507472649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321130460] [2021-06-05 14:34:59,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:34:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:00,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:00,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:00,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:00,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:00,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,357 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-06-05 14:35:00,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:00,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:00,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:00,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:00,415 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:35:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:00,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321130460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:00,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:35:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003944670] [2021-06-05 14:35:00,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:35:00,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:35:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:00,480 INFO L87 Difference]: Start difference. First operand 328 states and 877 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:00,755 INFO L93 Difference]: Finished difference Result 345 states and 902 transitions. [2021-06-05 14:35:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:00,755 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:35:00,755 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:35:00,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:35:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-06-05 14:35:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.674772036474164) internal successors, (880), 329 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 880 transitions. [2021-06-05 14:35:00,758 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 880 transitions. Word has length 18 [2021-06-05 14:35:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 880 transitions. [2021-06-05 14:35:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 880 transitions. [2021-06-05 14:35:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:00,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:00,759 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:00,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4743,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:00,959 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1340879013, now seen corresponding path program 282 times [2021-06-05 14:35:00,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:00,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691076063] [2021-06-05 14:35:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:01,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691076063] [2021-06-05 14:35:01,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691076063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862504033] [2021-06-05 14:35:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:01,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:01,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:01,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:01,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:01,722 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:01,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:01,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:01,737 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:01,741 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:01,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:01,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:01,749 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:01,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:01,781 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:35:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:01,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862504033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:01,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:35:01,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8358615] [2021-06-05 14:35:01,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:01,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:01,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:01,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:01,852 INFO L87 Difference]: Start difference. First operand 330 states and 880 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:02,305 INFO L93 Difference]: Finished difference Result 446 states and 1083 transitions. [2021-06-05 14:35:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:02,306 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:35:02,306 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:35:02,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:35:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 355. [2021-06-05 14:35:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.6638418079096047) internal successors, (943), 354 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2021-06-05 14:35:02,310 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 18 [2021-06-05 14:35:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:02,310 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2021-06-05 14:35:02,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2021-06-05 14:35:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:02,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:02,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:02,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 14:35:02,511 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:02,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1838990487, now seen corresponding path program 283 times [2021-06-05 14:35:02,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:02,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105118125] [2021-06-05 14:35:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:02,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105118125] [2021-06-05 14:35:02,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105118125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78353755] [2021-06-05 14:35:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:03,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:03,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:03,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:03,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:03,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:03,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:03,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:03,135 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:03,139 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:03,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:03,147 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:03,151 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:03,154 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:03,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:03,181 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:444, output treesize:41 [2021-06-05 14:35:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78353755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:03,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:35:03,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303393011] [2021-06-05 14:35:03,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:03,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:03,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:03,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:03,251 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:03,830 INFO L93 Difference]: Finished difference Result 484 states and 1149 transitions. [2021-06-05 14:35:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:35:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:03,831 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:35:03,831 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:35:03,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:35:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 358. [2021-06-05 14:35:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.669467787114846) internal successors, (953), 357 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 953 transitions. [2021-06-05 14:35:03,837 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 953 transitions. Word has length 18 [2021-06-05 14:35:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:03,837 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 953 transitions. [2021-06-05 14:35:03,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 953 transitions. [2021-06-05 14:35:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:03,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:03,838 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:04,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4818 [2021-06-05 14:35:04,061 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1799211045, now seen corresponding path program 284 times [2021-06-05 14:35:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:04,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124428186] [2021-06-05 14:35:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:04,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:04,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124428186] [2021-06-05 14:35:04,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124428186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:04,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212216931] [2021-06-05 14:35:04,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:04,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:04,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:04,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:04,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:04,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:04,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:04,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:04,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:04,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:04,713 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:04,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:04,720 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:04,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:04,776 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-06-05 14:35:04,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:04,778 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-06-05 14:35:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:04,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212216931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:04,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:04,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:35:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385610932] [2021-06-05 14:35:04,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:04,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:04,847 INFO L87 Difference]: Start difference. First operand 358 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:05,559 INFO L93 Difference]: Finished difference Result 495 states and 1172 transitions. [2021-06-05 14:35:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:35:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:05,560 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:35:05,560 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:35:05,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 864.3ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:35:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:35:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 360. [2021-06-05 14:35:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6740947075208914) internal successors, (960), 359 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 960 transitions. [2021-06-05 14:35:05,564 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 960 transitions. Word has length 18 [2021-06-05 14:35:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:05,564 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 960 transitions. [2021-06-05 14:35:05,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 960 transitions. [2021-06-05 14:35:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:05,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:05,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:05,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4854,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:05,765 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2101300247, now seen corresponding path program 285 times [2021-06-05 14:35:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801492476] [2021-06-05 14:35:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801492476] [2021-06-05 14:35:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801492476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19692532] [2021-06-05 14:35:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:06,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:06,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:06,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:06,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:06,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:06,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:06,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:06,424 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:35:06,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:06,433 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:06,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:06,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:35:06,443 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:06,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:06,472 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:510, output treesize:40 [2021-06-05 14:35:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:06,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19692532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:06,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:35:06,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30473337] [2021-06-05 14:35:06,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:35:06,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:35:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:06,579 INFO L87 Difference]: Start difference. First operand 360 states and 960 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,737 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:35:07,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:07,750 INFO L93 Difference]: Finished difference Result 457 states and 1104 transitions. [2021-06-05 14:35:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:35:07,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:07,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:07,751 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:35:07,751 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:35:07,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1311.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:35:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:35:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 341. [2021-06-05 14:35:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.679411764705882) internal successors, (911), 340 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 911 transitions. [2021-06-05 14:35:07,755 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 911 transitions. Word has length 18 [2021-06-05 14:35:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 911 transitions. [2021-06-05 14:35:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 911 transitions. [2021-06-05 14:35:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:07,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:07,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:07,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-06-05 14:35:07,956 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 456889317, now seen corresponding path program 286 times [2021-06-05 14:35:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:07,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032240901] [2021-06-05 14:35:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:08,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032240901] [2021-06-05 14:35:08,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032240901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382375210] [2021-06-05 14:35:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:08,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:08,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:08,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:08,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:08,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:08,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:08,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:08,574 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:08,578 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:08,582 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:08,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:08,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:08,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:08,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,648 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-06-05 14:35:08,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:08,650 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-06-05 14:35:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382375210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:08,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:35:08,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293503862] [2021-06-05 14:35:08,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:08,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:08,757 INFO L87 Difference]: Start difference. First operand 341 states and 911 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:09,227 INFO L93 Difference]: Finished difference Result 374 states and 966 transitions. [2021-06-05 14:35:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:09,227 INFO L225 Difference]: With dead ends: 374 [2021-06-05 14:35:09,227 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:35:09,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:35:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 341. [2021-06-05 14:35:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.679411764705882) internal successors, (911), 340 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 911 transitions. [2021-06-05 14:35:09,230 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 911 transitions. Word has length 18 [2021-06-05 14:35:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:09,231 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 911 transitions. [2021-06-05 14:35:09,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 911 transitions. [2021-06-05 14:35:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:09,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:09,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:09,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:09,432 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:09,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1518967579, now seen corresponding path program 287 times [2021-06-05 14:35:09,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:09,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651579707] [2021-06-05 14:35:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:09,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651579707] [2021-06-05 14:35:09,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651579707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893066612] [2021-06-05 14:35:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:09,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:09,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:09,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:09,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:09,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:09,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:09,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:09,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:09,886 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:35:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893066612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:09,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:09,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953849045] [2021-06-05 14:35:09,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:09,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:09,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:09,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:09,954 INFO L87 Difference]: Start difference. First operand 341 states and 911 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:10,519 INFO L93 Difference]: Finished difference Result 452 states and 1116 transitions. [2021-06-05 14:35:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:10,520 INFO L225 Difference]: With dead ends: 452 [2021-06-05 14:35:10,520 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:35:10,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 718.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:35:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:35:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 357. [2021-06-05 14:35:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.696629213483146) internal successors, (960), 356 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 960 transitions. [2021-06-05 14:35:10,523 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 960 transitions. Word has length 18 [2021-06-05 14:35:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:10,523 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 960 transitions. [2021-06-05 14:35:10,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 960 transitions. [2021-06-05 14:35:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:10,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:10,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:10,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-06-05 14:35:10,724 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1124511575, now seen corresponding path program 288 times [2021-06-05 14:35:10,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:10,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685936032] [2021-06-05 14:35:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:10,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:10,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685936032] [2021-06-05 14:35:10,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685936032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345062239] [2021-06-05 14:35:10,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:11,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:11,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:11,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:35:11,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:11,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:11,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:11,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:11,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:11,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:11,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:11,307 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:35:11,311 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:11,314 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:11,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:11,343 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:486, output treesize:40 [2021-06-05 14:35:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:11,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345062239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:11,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:11,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922737825] [2021-06-05 14:35:11,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:11,450 INFO L87 Difference]: Start difference. First operand 357 states and 960 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,374 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 14:35:12,506 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 14:35:12,890 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:35:13,150 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 14:35:13,653 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 14:35:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:13,888 INFO L93 Difference]: Finished difference Result 632 states and 1426 transitions. [2021-06-05 14:35:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:35:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:13,889 INFO L225 Difference]: With dead ends: 632 [2021-06-05 14:35:13,889 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:35:13,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2407.4ms TimeCoverageRelationStatistics Valid=345, Invalid=2105, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:35:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:35:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 360. [2021-06-05 14:35:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6963788300835656) internal successors, (968), 359 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 968 transitions. [2021-06-05 14:35:13,894 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 968 transitions. Word has length 18 [2021-06-05 14:35:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:13,895 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 968 transitions. [2021-06-05 14:35:13,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 968 transitions. [2021-06-05 14:35:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:13,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:13,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:14,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-06-05 14:35:14,109 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1433677989, now seen corresponding path program 289 times [2021-06-05 14:35:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:14,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467136530] [2021-06-05 14:35:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:14,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467136530] [2021-06-05 14:35:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467136530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863629574] [2021-06-05 14:35:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:14,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:14,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:14,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:14,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:14,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:14,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:14,731 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:14,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:14,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:14,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:14,772 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-06-05 14:35:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863629574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:14,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848668719] [2021-06-05 14:35:14,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:14,886 INFO L87 Difference]: Start difference. First operand 360 states and 968 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:15,383 INFO L93 Difference]: Finished difference Result 463 states and 1138 transitions. [2021-06-05 14:35:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:15,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:15,384 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:35:15,384 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:35:15,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:35:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 360. [2021-06-05 14:35:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.6963788300835656) internal successors, (968), 359 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 968 transitions. [2021-06-05 14:35:15,388 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 968 transitions. Word has length 18 [2021-06-05 14:35:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:15,388 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 968 transitions. [2021-06-05 14:35:15,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 968 transitions. [2021-06-05 14:35:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:15,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:15,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:15,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5073 [2021-06-05 14:35:15,589 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash -586655997, now seen corresponding path program 290 times [2021-06-05 14:35:15,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:15,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856714833] [2021-06-05 14:35:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:15,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856714833] [2021-06-05 14:35:15,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856714833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465482102] [2021-06-05 14:35:15,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:15,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:15,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:16,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:16,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:16,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:16,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,189 INFO L628 ElimStorePlain]: treesize reduction 172, result has 30.9 percent of original size [2021-06-05 14:35:16,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:16,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:16,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:16,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:16,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:16,252 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:35:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:16,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465482102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:16,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544714091] [2021-06-05 14:35:16,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:16,356 INFO L87 Difference]: Start difference. First operand 360 states and 968 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:16,854 INFO L93 Difference]: Finished difference Result 504 states and 1217 transitions. [2021-06-05 14:35:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:35:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:16,855 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:35:16,855 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:35:16,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:35:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 365. [2021-06-05 14:35:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.708791208791209) internal successors, (986), 364 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 986 transitions. [2021-06-05 14:35:16,859 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 986 transitions. Word has length 18 [2021-06-05 14:35:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:16,859 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 986 transitions. [2021-06-05 14:35:16,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 986 transitions. [2021-06-05 14:35:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:16,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:16,859 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:17,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5125,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,060 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1971533567, now seen corresponding path program 291 times [2021-06-05 14:35:17,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:17,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942629842] [2021-06-05 14:35:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:17,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942629842] [2021-06-05 14:35:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942629842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419777478] [2021-06-05 14:35:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:35:17,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:17,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:17,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:17,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:17,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,865 INFO L628 ElimStorePlain]: treesize reduction 232, result has 23.2 percent of original size [2021-06-05 14:35:17,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:17,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:17,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:17,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:17,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:17,927 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:442, output treesize:40 [2021-06-05 14:35:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419777478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:18,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516259523] [2021-06-05 14:35:18,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:18,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:18,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:18,035 INFO L87 Difference]: Start difference. First operand 365 states and 986 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,051 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:35:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:19,080 INFO L93 Difference]: Finished difference Result 552 states and 1295 transitions. [2021-06-05 14:35:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:35:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:19,081 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:35:19,081 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 14:35:19,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1286.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:35:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 14:35:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 367. [2021-06-05 14:35:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.710382513661202) internal successors, (992), 366 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 992 transitions. [2021-06-05 14:35:19,085 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 992 transitions. Word has length 18 [2021-06-05 14:35:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:19,085 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 992 transitions. [2021-06-05 14:35:19,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 992 transitions. [2021-06-05 14:35:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:19,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:19,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:19,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5151 [2021-06-05 14:35:19,286 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash 655376263, now seen corresponding path program 292 times [2021-06-05 14:35:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:19,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149482949] [2021-06-05 14:35:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:19,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:19,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149482949] [2021-06-05 14:35:19,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149482949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836457458] [2021-06-05 14:35:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:19,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:19,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:19,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:19,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:19,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:19,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,927 INFO L628 ElimStorePlain]: treesize reduction 261, result has 23.0 percent of original size [2021-06-05 14:35:19,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:19,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:19,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:19,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:19,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:19,987 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-06-05 14:35:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836457458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:20,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:35:20,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881754504] [2021-06-05 14:35:20,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:35:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:35:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:20,046 INFO L87 Difference]: Start difference. First operand 367 states and 992 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:20,506 INFO L93 Difference]: Finished difference Result 469 states and 1162 transitions. [2021-06-05 14:35:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:20,507 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:35:20,507 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:35:20,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:35:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 362. [2021-06-05 14:35:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-06-05 14:35:20,511 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-06-05 14:35:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:20,511 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-06-05 14:35:20,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-06-05 14:35:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:20,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:20,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:20,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5178 [2021-06-05 14:35:20,712 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1623312727, now seen corresponding path program 293 times [2021-06-05 14:35:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:20,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980678804] [2021-06-05 14:35:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980678804] [2021-06-05 14:35:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980678804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127975455] [2021-06-05 14:35:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:21,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:21,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:21,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:21,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:21,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:21,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:21,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:21,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:21,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:21,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:21,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:21,375 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-06-05 14:35:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:21,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127975455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:21,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992753091] [2021-06-05 14:35:21,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:21,442 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:21,773 INFO L93 Difference]: Finished difference Result 404 states and 1044 transitions. [2021-06-05 14:35:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:21,774 INFO L225 Difference]: With dead ends: 404 [2021-06-05 14:35:21,774 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:35:21,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:35:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 362. [2021-06-05 14:35:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-06-05 14:35:21,777 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-06-05 14:35:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:21,777 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-06-05 14:35:21,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-06-05 14:35:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:21,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:21,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:21,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5205,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:21,978 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2014888805, now seen corresponding path program 294 times [2021-06-05 14:35:21,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:21,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193105737] [2021-06-05 14:35:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193105737] [2021-06-05 14:35:22,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193105737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603552049] [2021-06-05 14:35:22,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:22,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:22,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:22,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:22,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:22,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:22,546 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:22,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:22,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:22,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:22,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:22,584 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-06-05 14:35:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603552049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:22,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:22,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143111955] [2021-06-05 14:35:22,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:22,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:22,651 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:23,166 INFO L93 Difference]: Finished difference Result 407 states and 1049 transitions. [2021-06-05 14:35:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:23,166 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:35:23,166 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:35:23,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:35:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 362. [2021-06-05 14:35:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-06-05 14:35:23,170 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-06-05 14:35:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:23,170 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-06-05 14:35:23,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-06-05 14:35:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:23,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:23,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5258 [2021-06-05 14:35:23,371 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1885622487, now seen corresponding path program 295 times [2021-06-05 14:35:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658476482] [2021-06-05 14:35:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:23,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658476482] [2021-06-05 14:35:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658476482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611116285] [2021-06-05 14:35:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:23,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:23,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:23,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:23,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:23,916 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:23,920 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:23,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:23,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:23,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:23,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:23,940 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:23,943 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:23,947 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:23,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:23,955 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:23,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:23,958 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:24,014 INFO L628 ElimStorePlain]: treesize reduction 25, result has 69.9 percent of original size [2021-06-05 14:35:24,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:24,016 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-06-05 14:35:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611116285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:24,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:35:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721917387] [2021-06-05 14:35:24,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:24,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:24,123 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:24,707 INFO L93 Difference]: Finished difference Result 418 states and 1064 transitions. [2021-06-05 14:35:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:24,708 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:35:24,708 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 14:35:24,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:35:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 14:35:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 362. [2021-06-05 14:35:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-06-05 14:35:24,711 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-06-05 14:35:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:24,711 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-06-05 14:35:24,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-06-05 14:35:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:24,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:24,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:24,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5317,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,912 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 672567077, now seen corresponding path program 296 times [2021-06-05 14:35:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076485050] [2021-06-05 14:35:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076485050] [2021-06-05 14:35:25,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076485050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774721596] [2021-06-05 14:35:25,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:25,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:25,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:25,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:25,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:25,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:25,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:25,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:25,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:25,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:25,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:25,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:25,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:25,667 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:25,671 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:25,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:25,703 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:446, output treesize:40 [2021-06-05 14:35:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774721596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:25,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:35:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231256796] [2021-06-05 14:35:25,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:25,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:25,808 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:26,539 INFO L93 Difference]: Finished difference Result 406 states and 1046 transitions. [2021-06-05 14:35:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:26,539 INFO L225 Difference]: With dead ends: 406 [2021-06-05 14:35:26,539 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:35:26,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:35:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:35:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 362. [2021-06-05 14:35:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.709141274238227) internal successors, (978), 361 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 978 transitions. [2021-06-05 14:35:26,543 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 978 transitions. Word has length 18 [2021-06-05 14:35:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:26,543 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 978 transitions. [2021-06-05 14:35:26,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 978 transitions. [2021-06-05 14:35:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:26,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:26,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:26,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-06-05 14:35:26,744 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1303289819, now seen corresponding path program 297 times [2021-06-05 14:35:26,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:26,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553176853] [2021-06-05 14:35:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:26,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553176853] [2021-06-05 14:35:26,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553176853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690348583] [2021-06-05 14:35:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:27,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:27,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:27,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:27,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:27,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:27,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:27,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:35:27,373 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:27,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:27,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:35:27,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:27,392 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:27,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:27,396 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:27,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:27,427 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:492, output treesize:41 [2021-06-05 14:35:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:27,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690348583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:27,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:27,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195467808] [2021-06-05 14:35:27,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:27,513 INFO L87 Difference]: Start difference. First operand 362 states and 978 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:29,394 INFO L93 Difference]: Finished difference Result 566 states and 1345 transitions. [2021-06-05 14:35:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:35:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:29,395 INFO L225 Difference]: With dead ends: 566 [2021-06-05 14:35:29,395 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:35:29,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1915.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:35:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:35:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2021-06-05 14:35:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.7087628865979383) internal successors, (1051), 388 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1051 transitions. [2021-06-05 14:35:29,399 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1051 transitions. Word has length 18 [2021-06-05 14:35:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:29,399 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1051 transitions. [2021-06-05 14:35:29,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1051 transitions. [2021-06-05 14:35:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:29,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:29,399 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:29,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-06-05 14:35:29,600 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -908833815, now seen corresponding path program 298 times [2021-06-05 14:35:29,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:29,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199761185] [2021-06-05 14:35:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199761185] [2021-06-05 14:35:29,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199761185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884632045] [2021-06-05 14:35:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:30,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:30,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:30,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:30,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:30,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:30,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:30,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:30,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:30,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:30,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:30,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:30,152 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-06-05 14:35:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884632045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392778238] [2021-06-05 14:35:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:30,254 INFO L87 Difference]: Start difference. First operand 389 states and 1051 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:30,757 INFO L93 Difference]: Finished difference Result 498 states and 1241 transitions. [2021-06-05 14:35:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:30,758 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:35:30,758 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:35:30,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 646.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:35:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 395. [2021-06-05 14:35:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.715736040609137) internal successors, (1070), 394 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1070 transitions. [2021-06-05 14:35:30,762 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1070 transitions. Word has length 18 [2021-06-05 14:35:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:30,762 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1070 transitions. [2021-06-05 14:35:30,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1070 transitions. [2021-06-05 14:35:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:30,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:30,762 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:30,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5471,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,963 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1649355749, now seen corresponding path program 299 times [2021-06-05 14:35:30,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:30,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607645767] [2021-06-05 14:35:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607645767] [2021-06-05 14:35:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607645767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668519190] [2021-06-05 14:35:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:35:31,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:31,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:31,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:31,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:31,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:31,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:31,373 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-06-05 14:35:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668519190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:31,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:31,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680008245] [2021-06-05 14:35:31,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:31,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:31,479 INFO L87 Difference]: Start difference. First operand 395 states and 1070 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:32,065 INFO L93 Difference]: Finished difference Result 522 states and 1311 transitions. [2021-06-05 14:35:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:32,066 INFO L225 Difference]: With dead ends: 522 [2021-06-05 14:35:32,066 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:35:32,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:35:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:35:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 414. [2021-06-05 14:35:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.736077481840194) internal successors, (1130), 413 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1130 transitions. [2021-06-05 14:35:32,072 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1130 transitions. Word has length 18 [2021-06-05 14:35:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:32,072 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1130 transitions. [2021-06-05 14:35:32,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1130 transitions. [2021-06-05 14:35:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:32,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:32,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5521,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,289 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash -370978237, now seen corresponding path program 300 times [2021-06-05 14:35:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600583955] [2021-06-05 14:35:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:35:32,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:32,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600583955] [2021-06-05 14:35:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600583955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126158861] [2021-06-05 14:35:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:32,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:32,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:32,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:32,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:32,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:32,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:32,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:32,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:32,725 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:141, output treesize:40 [2021-06-05 14:35:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:32,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126158861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:32,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:32,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508811791] [2021-06-05 14:35:32,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:32,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:32,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:32,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:32,831 INFO L87 Difference]: Start difference. First operand 414 states and 1130 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:33,415 INFO L93 Difference]: Finished difference Result 520 states and 1304 transitions. [2021-06-05 14:35:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:33,416 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:35:33,416 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:35:33,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:35:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:35:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 414. [2021-06-05 14:35:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.7336561743341403) internal successors, (1129), 413 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1129 transitions. [2021-06-05 14:35:33,420 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1129 transitions. Word has length 18 [2021-06-05 14:35:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:33,420 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1129 transitions. [2021-06-05 14:35:33,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1129 transitions. [2021-06-05 14:35:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:33,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:33,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:33,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5529,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:33,621 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2107755969, now seen corresponding path program 301 times [2021-06-05 14:35:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:33,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208335200] [2021-06-05 14:35:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:35:33,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:33,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208335200] [2021-06-05 14:35:33,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208335200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:33,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152667318] [2021-06-05 14:35:33,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:33,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:34,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:34,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:34,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:34,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:34,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:34,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,177 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-06-05 14:35:34,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:34,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:34,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:34,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:34,239 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:35:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:34,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152667318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:34,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:34,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195723906] [2021-06-05 14:35:34,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:34,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:34,342 INFO L87 Difference]: Start difference. First operand 414 states and 1129 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:34,908 INFO L93 Difference]: Finished difference Result 500 states and 1269 transitions. [2021-06-05 14:35:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:34,909 INFO L225 Difference]: With dead ends: 500 [2021-06-05 14:35:34,909 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:35:34,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:35:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 412. [2021-06-05 14:35:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.72992700729927) internal successors, (1122), 411 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1122 transitions. [2021-06-05 14:35:34,913 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1122 transitions. Word has length 18 [2021-06-05 14:35:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:34,914 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1122 transitions. [2021-06-05 14:35:34,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1122 transitions. [2021-06-05 14:35:34,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:34,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:34,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:35,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 14:35:35,115 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 871054023, now seen corresponding path program 302 times [2021-06-05 14:35:35,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:35,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58266124] [2021-06-05 14:35:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:35:35,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58266124] [2021-06-05 14:35:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58266124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921685173] [2021-06-05 14:35:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:35,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:35,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:35,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:35,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:35,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,720 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-06-05 14:35:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:35,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:35,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:35,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:35,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:35,780 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:35:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:35,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921685173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:35,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:35:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959409962] [2021-06-05 14:35:35,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:35:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:35:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:35,848 INFO L87 Difference]: Start difference. First operand 412 states and 1122 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:36,402 INFO L93 Difference]: Finished difference Result 480 states and 1234 transitions. [2021-06-05 14:35:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:36,403 INFO L225 Difference]: With dead ends: 480 [2021-06-05 14:35:36,403 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 14:35:36,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 14:35:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 416. [2021-06-05 14:35:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.7228915662650603) internal successors, (1130), 415 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1130 transitions. [2021-06-05 14:35:36,407 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1130 transitions. Word has length 18 [2021-06-05 14:35:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:36,407 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1130 transitions. [2021-06-05 14:35:36,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1130 transitions. [2021-06-05 14:35:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:36,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:36,407 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:36,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5564 [2021-06-05 14:35:36,608 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash -877324503, now seen corresponding path program 303 times [2021-06-05 14:35:36,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:36,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749011947] [2021-06-05 14:35:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:36,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749011947] [2021-06-05 14:35:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749011947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919146733] [2021-06-05 14:35:36,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:36,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:37,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:37,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:35:37,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:37,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:37,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:37,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,298 INFO L628 ElimStorePlain]: treesize reduction 263, result has 22.6 percent of original size [2021-06-05 14:35:37,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 14:35:37,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:37,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:37,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:37,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:37,362 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:488, output treesize:40 [2021-06-05 14:35:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:37,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919146733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:37,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:37,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:35:37,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675440667] [2021-06-05 14:35:37,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:35:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:35:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:37,470 INFO L87 Difference]: Start difference. First operand 416 states and 1130 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:38,616 INFO L93 Difference]: Finished difference Result 573 states and 1398 transitions. [2021-06-05 14:35:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:35:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:38,617 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:35:38,617 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:35:38,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1249.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:35:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:35:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 427. [2021-06-05 14:35:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.73943661971831) internal successors, (1167), 426 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1167 transitions. [2021-06-05 14:35:38,621 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1167 transitions. Word has length 18 [2021-06-05 14:35:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:38,621 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1167 transitions. [2021-06-05 14:35:38,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1167 transitions. [2021-06-05 14:35:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:38,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:38,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:38,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5588,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:38,822 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1680865061, now seen corresponding path program 304 times [2021-06-05 14:35:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:38,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908164928] [2021-06-05 14:35:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:38,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908164928] [2021-06-05 14:35:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908164928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731061732] [2021-06-05 14:35:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:39,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:39,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:39,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:39,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:39,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:39,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,441 INFO L628 ElimStorePlain]: treesize reduction 258, result has 21.8 percent of original size [2021-06-05 14:35:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:39,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:39,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:39,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:39,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:39,503 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:35:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731061732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:39,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:35:39,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489041979] [2021-06-05 14:35:39,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:35:39,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:35:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:39,610 INFO L87 Difference]: Start difference. First operand 427 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:40,354 INFO L93 Difference]: Finished difference Result 573 states and 1402 transitions. [2021-06-05 14:35:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:35:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:40,355 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:35:40,355 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:35:40,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 825.4ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:35:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:35:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 429. [2021-06-05 14:35:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.7383177570093458) internal successors, (1172), 428 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1172 transitions. [2021-06-05 14:35:40,359 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1172 transitions. Word has length 18 [2021-06-05 14:35:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:40,359 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1172 transitions. [2021-06-05 14:35:40,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1172 transitions. [2021-06-05 14:35:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:40,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:40,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:40,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5616 [2021-06-05 14:35:40,560 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 364707757, now seen corresponding path program 305 times [2021-06-05 14:35:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:40,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222545617] [2021-06-05 14:35:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:40,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222545617] [2021-06-05 14:35:40,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222545617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95700701] [2021-06-05 14:35:40,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:40,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:41,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:41,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:41,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:41,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:41,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:41,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:41,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-06-05 14:35:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:41,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95700701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:41,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:41,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:35:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085599809] [2021-06-05 14:35:41,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:35:41,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:35:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:41,247 INFO L87 Difference]: Start difference. First operand 429 states and 1172 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:41,921 INFO L93 Difference]: Finished difference Result 591 states and 1452 transitions. [2021-06-05 14:35:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:35:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:41,922 INFO L225 Difference]: With dead ends: 591 [2021-06-05 14:35:41,922 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 14:35:41,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 899.8ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:35:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 14:35:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 437. [2021-06-05 14:35:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.7522935779816513) internal successors, (1200), 436 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1200 transitions. [2021-06-05 14:35:41,927 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1200 transitions. Word has length 18 [2021-06-05 14:35:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:41,927 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1200 transitions. [2021-06-05 14:35:41,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1200 transitions. [2021-06-05 14:35:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:41,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:41,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:42,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:42,128 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1781463003, now seen corresponding path program 306 times [2021-06-05 14:35:42,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:42,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771061204] [2021-06-05 14:35:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:42,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771061204] [2021-06-05 14:35:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771061204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672642621] [2021-06-05 14:35:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:42,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:42,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:43,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:43,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:35:43,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:43,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:43,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:43,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:43,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:43,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:43,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:43,078 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:35:43,082 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:43,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,157 INFO L628 ElimStorePlain]: treesize reduction 27, result has 74.0 percent of original size [2021-06-05 14:35:43,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:43,161 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:566, output treesize:41 [2021-06-05 14:35:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:43,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672642621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:43,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:43,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:35:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810356365] [2021-06-05 14:35:43,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:43,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:43,237 INFO L87 Difference]: Start difference. First operand 437 states and 1200 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:43,850 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 14:35:44,322 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 14:35:44,911 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 14:35:45,331 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 14:35:45,496 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 14:35:45,793 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 14:35:45,964 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 14:35:46,140 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 14:35:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:46,262 INFO L93 Difference]: Finished difference Result 692 states and 1620 transitions. [2021-06-05 14:35:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:35:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:46,263 INFO L225 Difference]: With dead ends: 692 [2021-06-05 14:35:46,263 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:35:46,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 3031.0ms TimeCoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:35:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:35:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 448. [2021-06-05 14:35:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.756152125279642) internal successors, (1232), 447 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1232 transitions. [2021-06-05 14:35:46,268 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1232 transitions. Word has length 18 [2021-06-05 14:35:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:46,268 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1232 transitions. [2021-06-05 14:35:46,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1232 transitions. [2021-06-05 14:35:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:46,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:46,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:46,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5654,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:46,469 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2035187715, now seen corresponding path program 307 times [2021-06-05 14:35:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:46,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996752144] [2021-06-05 14:35:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:46,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:46,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996752144] [2021-06-05 14:35:46,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996752144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:46,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830109562] [2021-06-05 14:35:46,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:47,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:47,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:47,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:47,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:47,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:47,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:47,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:47,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:47,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:47,214 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:47,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:47,241 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:343, output treesize:41 [2021-06-05 14:35:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:47,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830109562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:47,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:47,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:35:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789480596] [2021-06-05 14:35:47,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:47,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:47,311 INFO L87 Difference]: Start difference. First operand 448 states and 1232 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:47,758 INFO L93 Difference]: Finished difference Result 544 states and 1399 transitions. [2021-06-05 14:35:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:35:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:47,759 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:35:47,759 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:35:47,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 671.7ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:35:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 461. [2021-06-05 14:35:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.760869565217391) internal successors, (1270), 460 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1270 transitions. [2021-06-05 14:35:47,764 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1270 transitions. Word has length 18 [2021-06-05 14:35:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:47,764 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1270 transitions. [2021-06-05 14:35:47,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1270 transitions. [2021-06-05 14:35:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:47,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:47,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:47,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5722,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:47,974 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1378421951, now seen corresponding path program 308 times [2021-06-05 14:35:47,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:47,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12006771] [2021-06-05 14:35:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12006771] [2021-06-05 14:35:48,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12006771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775536961] [2021-06-05 14:35:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:48,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:48,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:48,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:48,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:48,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:48,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:48,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:48,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:48,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:48,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:48,727 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:48,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:48,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:48,735 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:48,737 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:48,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:48,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:48,763 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:474, output treesize:41 [2021-06-05 14:35:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775536961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:48,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:35:48,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607081593] [2021-06-05 14:35:48,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:48,833 INFO L87 Difference]: Start difference. First operand 461 states and 1270 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:49,600 INFO L93 Difference]: Finished difference Result 563 states and 1434 transitions. [2021-06-05 14:35:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:35:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:49,601 INFO L225 Difference]: With dead ends: 563 [2021-06-05 14:35:49,601 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:35:49,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 944.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:35:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:35:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 463. [2021-06-05 14:35:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.764069264069264) internal successors, (1277), 462 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1277 transitions. [2021-06-05 14:35:49,605 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1277 transitions. Word has length 18 [2021-06-05 14:35:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:49,605 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1277 transitions. [2021-06-05 14:35:49,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1277 transitions. [2021-06-05 14:35:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:49,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:49,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:49,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-05 14:35:49,806 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:49,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1772877955, now seen corresponding path program 309 times [2021-06-05 14:35:49,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:49,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672727578] [2021-06-05 14:35:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672727578] [2021-06-05 14:35:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672727578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668480319] [2021-06-05 14:35:49,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:50,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:35:50,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:50,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:50,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:50,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:35:50,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:50,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:35:50,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:50,401 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:50,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:50,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,413 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:50,417 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:50,421 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:50,425 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:50,429 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,432 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:50,435 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,489 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-06-05 14:35:50,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:50,490 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:40 [2021-06-05 14:35:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:50,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668480319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:50,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:50,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:35:50,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607287282] [2021-06-05 14:35:50,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:35:50,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:35:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:50,597 INFO L87 Difference]: Start difference. First operand 463 states and 1277 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,629 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:35:51,762 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 14:35:52,021 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:35:52,140 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:35:52,293 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:35:52,450 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 14:35:52,614 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 14:35:52,798 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 14:35:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:52,832 INFO L93 Difference]: Finished difference Result 683 states and 1695 transitions. [2021-06-05 14:35:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:35:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:52,833 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:35:52,833 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:35:52,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:35:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:35:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 468. [2021-06-05 14:35:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-06-05 14:35:52,838 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-06-05 14:35:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:52,838 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-06-05 14:35:52,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-06-05 14:35:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:52,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:52,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:53,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5838 [2021-06-05 14:35:53,039 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:53,039 INFO L82 PathProgramCache]: Analyzing trace with hash 36100223, now seen corresponding path program 310 times [2021-06-05 14:35:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:53,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320298279] [2021-06-05 14:35:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:53,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320298279] [2021-06-05 14:35:53,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320298279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621258470] [2021-06-05 14:35:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:53,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:53,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:53,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:53,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:53,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:53,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:35:53,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:53,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:53,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:53,773 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:53,777 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:53,780 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:53,784 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:53,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:53,788 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:53,842 INFO L628 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2021-06-05 14:35:53,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:53,844 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:470, output treesize:40 [2021-06-05 14:35:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621258470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:53,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:53,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:35:53,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763291843] [2021-06-05 14:35:53,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:53,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:53,949 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:54,434 INFO L93 Difference]: Finished difference Result 509 states and 1347 transitions. [2021-06-05 14:35:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:54,435 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:35:54,435 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:35:54,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:35:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 468. [2021-06-05 14:35:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-06-05 14:35:54,440 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-06-05 14:35:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:54,440 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-06-05 14:35:54,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-06-05 14:35:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:54,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:54,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:54,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5888,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:54,641 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash 67609535, now seen corresponding path program 311 times [2021-06-05 14:35:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:54,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543612415] [2021-06-05 14:35:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:54,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543612415] [2021-06-05 14:35:54,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543612415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833184680] [2021-06-05 14:35:54,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:54,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:55,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:55,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:55,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:55,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:55,039 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:55,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:55,058 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-06-05 14:35:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833184680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:55,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:55,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:55,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315639732] [2021-06-05 14:35:55,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:55,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:55,161 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:55,728 INFO L93 Difference]: Finished difference Result 535 states and 1383 transitions. [2021-06-05 14:35:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:35:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:55,729 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:35:55,729 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:35:55,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:35:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:35:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 468. [2021-06-05 14:35:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7516059957173447) internal successors, (1285), 467 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1285 transitions. [2021-06-05 14:35:55,734 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1285 transitions. Word has length 18 [2021-06-05 14:35:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:55,734 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1285 transitions. [2021-06-05 14:35:55,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1285 transitions. [2021-06-05 14:35:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:55,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:55,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:55,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5937 [2021-06-05 14:35:55,956 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1939756673, now seen corresponding path program 312 times [2021-06-05 14:35:55,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:55,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426304000] [2021-06-05 14:35:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:56,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426304000] [2021-06-05 14:35:56,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426304000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105283804] [2021-06-05 14:35:56,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:56,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:35:56,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:56,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:56,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:35:56,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:35:56,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:56,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:35:56,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:35:56,596 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:35:56,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:35:56,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:56,612 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:56,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:35:56,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:56,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:56,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:56,648 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:492, output treesize:41 [2021-06-05 14:35:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105283804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:56,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:35:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808744464] [2021-06-05 14:35:56,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:35:56,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:35:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:56,712 INFO L87 Difference]: Start difference. First operand 468 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:57,978 INFO L93 Difference]: Finished difference Result 626 states and 1589 transitions. [2021-06-05 14:35:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:35:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:57,979 INFO L225 Difference]: With dead ends: 626 [2021-06-05 14:35:57,979 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:35:57,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1367.5ms TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:35:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:35:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 471. [2021-06-05 14:35:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.751063829787234) internal successors, (1293), 470 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1293 transitions. [2021-06-05 14:35:57,984 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1293 transitions. Word has length 18 [2021-06-05 14:35:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:57,984 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1293 transitions. [2021-06-05 14:35:57,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1293 transitions. [2021-06-05 14:35:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:57,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:57,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:58,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5946,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,185 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1545300669, now seen corresponding path program 313 times [2021-06-05 14:35:58,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:58,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905438793] [2021-06-05 14:35:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:58,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:58,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905438793] [2021-06-05 14:35:58,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905438793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:58,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528693282] [2021-06-05 14:35:58,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:58,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:58,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:58,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:58,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:35:58,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:35:58,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:58,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:35:58,751 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:35:58,759 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:35:58,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:58,766 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:58,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:35:58,770 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:58,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:58,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:58,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:58,801 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:40 [2021-06-05 14:35:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:58,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528693282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:58,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:58,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:35:58,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123418420] [2021-06-05 14:35:58,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:35:58,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:35:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:58,900 INFO L87 Difference]: Start difference. First operand 471 states and 1293 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:59,361 INFO L93 Difference]: Finished difference Result 541 states and 1391 transitions. [2021-06-05 14:35:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:35:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:59,361 INFO L225 Difference]: With dead ends: 541 [2021-06-05 14:35:59,361 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:35:59,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:35:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 470. [2021-06-05 14:35:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.746268656716418) internal successors, (1288), 469 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1288 transitions. [2021-06-05 14:35:59,366 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1288 transitions. Word has length 18 [2021-06-05 14:35:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:59,366 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1288 transitions. [2021-06-05 14:35:59,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1288 transitions. [2021-06-05 14:35:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:35:59,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:59,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:59,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5978,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:59,567 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1550744473, now seen corresponding path program 314 times [2021-06-05 14:35:59,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:59,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532617036] [2021-06-05 14:35:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:35:59,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532617036] [2021-06-05 14:35:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532617036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712054089] [2021-06-05 14:35:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:59,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:59,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:35:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:00,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:00,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:00,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:00,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:00,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:00,198 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-06-05 14:36:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:00,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:00,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:00,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:00,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:00,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:00,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:00,263 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:36:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712054089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:36:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660761876] [2021-06-05 14:36:00,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:00,361 INFO L87 Difference]: Start difference. First operand 470 states and 1288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:01,016 INFO L93 Difference]: Finished difference Result 500 states and 1332 transitions. [2021-06-05 14:36:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:01,017 INFO L225 Difference]: With dead ends: 500 [2021-06-05 14:36:01,017 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:36:01,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 891.4ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:36:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 470. [2021-06-05 14:36:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.746268656716418) internal successors, (1288), 469 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1288 transitions. [2021-06-05 14:36:01,023 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1288 transitions. Word has length 18 [2021-06-05 14:36:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:01,023 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1288 transitions. [2021-06-05 14:36:01,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1288 transitions. [2021-06-05 14:36:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:01,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:01,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:01,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6051 [2021-06-05 14:36:01,246 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1513791357, now seen corresponding path program 315 times [2021-06-05 14:36:01,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:01,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561757362] [2021-06-05 14:36:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:01,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:01,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561757362] [2021-06-05 14:36:01,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561757362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:01,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815684995] [2021-06-05 14:36:01,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:01,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:36:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:01,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:01,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:01,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:01,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:01,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:02,065 INFO L628 ElimStorePlain]: treesize reduction 261, result has 24.1 percent of original size [2021-06-05 14:36:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:02,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 14:36:02,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:02,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:02,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 14:36:02,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:02,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:02,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:02,140 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-06-05 14:36:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815684995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:02,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:02,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:02,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097126311] [2021-06-05 14:36:02,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:02,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:02,246 INFO L87 Difference]: Start difference. First operand 470 states and 1288 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:03,051 INFO L93 Difference]: Finished difference Result 532 states and 1381 transitions. [2021-06-05 14:36:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:36:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:03,052 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:36:03,052 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 14:36:03,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1167.2ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:36:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 14:36:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 468. [2021-06-05 14:36:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7451820128479656) internal successors, (1282), 467 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1282 transitions. [2021-06-05 14:36:03,057 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1282 transitions. Word has length 18 [2021-06-05 14:36:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:03,057 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1282 transitions. [2021-06-05 14:36:03,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1282 transitions. [2021-06-05 14:36:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:03,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:03,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:03,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6076 [2021-06-05 14:36:03,258 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1044398207, now seen corresponding path program 316 times [2021-06-05 14:36:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:03,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910672484] [2021-06-05 14:36:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:03,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910672484] [2021-06-05 14:36:03,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910672484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624420826] [2021-06-05 14:36:03,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:03,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:03,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:03,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:03,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:03,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,865 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-06-05 14:36:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:03,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:03,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:03,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:03,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:03,927 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624420826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:36:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032225032] [2021-06-05 14:36:04,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:36:04,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:36:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:04,030 INFO L87 Difference]: Start difference. First operand 468 states and 1282 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:04,681 INFO L93 Difference]: Finished difference Result 523 states and 1365 transitions. [2021-06-05 14:36:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:04,682 INFO L225 Difference]: With dead ends: 523 [2021-06-05 14:36:04,682 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 14:36:04,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 14:36:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 469. [2021-06-05 14:36:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.7457264957264957) internal successors, (1285), 468 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1285 transitions. [2021-06-05 14:36:04,686 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1285 transitions. Word has length 18 [2021-06-05 14:36:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:04,686 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1285 transitions. [2021-06-05 14:36:04,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1285 transitions. [2021-06-05 14:36:04,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:04,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:04,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:04,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6101 [2021-06-05 14:36:04,887 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1877037439, now seen corresponding path program 317 times [2021-06-05 14:36:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:04,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428109311] [2021-06-05 14:36:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428109311] [2021-06-05 14:36:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428109311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784487460] [2021-06-05 14:36:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:05,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:05,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:05,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:05,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:05,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:05,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:05,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,685 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:36:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:05,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:05,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:05,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:05,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:05,744 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:36:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784487460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:05,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:36:05,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650663746] [2021-06-05 14:36:05,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:36:05,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:36:05,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:05,815 INFO L87 Difference]: Start difference. First operand 469 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:06,136 INFO L93 Difference]: Finished difference Result 504 states and 1337 transitions. [2021-06-05 14:36:06,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:06,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:06,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:06,137 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:36:06,137 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:36:06,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:36:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 469. [2021-06-05 14:36:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.7457264957264957) internal successors, (1285), 468 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1285 transitions. [2021-06-05 14:36:06,141 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1285 transitions. Word has length 18 [2021-06-05 14:36:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:06,141 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1285 transitions. [2021-06-05 14:36:06,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1285 transitions. [2021-06-05 14:36:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:06,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:06,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:06,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6127,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:06,342 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1087753445, now seen corresponding path program 318 times [2021-06-05 14:36:06,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:06,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952829159] [2021-06-05 14:36:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:06,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952829159] [2021-06-05 14:36:06,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952829159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002541386] [2021-06-05 14:36:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:06,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:36:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:06,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:36:06,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:06,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:06,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:06,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:06,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:36:06,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:06,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:06,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:06,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:06,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:06,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:06,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:06,957 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:325, output treesize:41 [2021-06-05 14:36:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002541386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:07,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:36:07,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726685593] [2021-06-05 14:36:07,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:36:07,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:07,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:36:07,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:07,014 INFO L87 Difference]: Start difference. First operand 469 states and 1285 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 14:36:08,209 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:36:08,436 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 14:36:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:08,473 INFO L93 Difference]: Finished difference Result 654 states and 1635 transitions. [2021-06-05 14:36:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:36:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:08,475 INFO L225 Difference]: With dead ends: 654 [2021-06-05 14:36:08,475 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:36:08,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1474.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:36:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:36:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 475. [2021-06-05 14:36:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 2.740506329113924) internal successors, (1299), 474 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1299 transitions. [2021-06-05 14:36:08,480 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1299 transitions. Word has length 18 [2021-06-05 14:36:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:08,480 INFO L482 AbstractCegarLoop]: Abstraction has 475 states and 1299 transitions. [2021-06-05 14:36:08,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1299 transitions. [2021-06-05 14:36:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:08,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:08,480 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:08,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6154,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:08,681 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1482209449, now seen corresponding path program 319 times [2021-06-05 14:36:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:08,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966641060] [2021-06-05 14:36:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:08,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:08,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966641060] [2021-06-05 14:36:08,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966641060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:08,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204795607] [2021-06-05 14:36:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:09,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:09,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:09,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:09,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:09,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:09,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:09,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:09,312 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:09,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:09,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:09,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:09,328 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:09,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:09,336 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:09,340 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:09,344 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,402 INFO L628 ElimStorePlain]: treesize reduction 65, result has 47.2 percent of original size [2021-06-05 14:36:09,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:09,404 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:40 [2021-06-05 14:36:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204795607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:09,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:09,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436296783] [2021-06-05 14:36:09,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:09,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:09,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:09,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:09,504 INFO L87 Difference]: Start difference. First operand 475 states and 1299 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:09,851 INFO L93 Difference]: Finished difference Result 558 states and 1433 transitions. [2021-06-05 14:36:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:09,852 INFO L225 Difference]: With dead ends: 558 [2021-06-05 14:36:09,852 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 14:36:09,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 14:36:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 480. [2021-06-05 14:36:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.7453027139874737) internal successors, (1315), 479 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1315 transitions. [2021-06-05 14:36:09,856 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1315 transitions. Word has length 18 [2021-06-05 14:36:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:09,856 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1315 transitions. [2021-06-05 14:36:09,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1315 transitions. [2021-06-05 14:36:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:09,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:09,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:10,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6191 [2021-06-05 14:36:10,057 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -254568283, now seen corresponding path program 320 times [2021-06-05 14:36:10,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:10,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648215140] [2021-06-05 14:36:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648215140] [2021-06-05 14:36:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648215140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975019399] [2021-06-05 14:36:10,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:10,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:10,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:36:10,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:10,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:10,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:10,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:10,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:10,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:10,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:10,726 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:10,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:10,734 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:36:10,739 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:10,793 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-06-05 14:36:10,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:10,795 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:440, output treesize:40 [2021-06-05 14:36:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975019399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:10,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:10,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064898024] [2021-06-05 14:36:10,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:10,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:10,895 INFO L87 Difference]: Start difference. First operand 480 states and 1315 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:11,226 INFO L93 Difference]: Finished difference Result 546 states and 1416 transitions. [2021-06-05 14:36:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:11,227 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:36:11,227 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:36:11,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 543.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:36:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 478. [2021-06-05 14:36:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.742138364779874) internal successors, (1308), 477 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1308 transitions. [2021-06-05 14:36:11,231 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1308 transitions. Word has length 18 [2021-06-05 14:36:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:11,232 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1308 transitions. [2021-06-05 14:36:11,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1308 transitions. [2021-06-05 14:36:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:11,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:11,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:11,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6263 [2021-06-05 14:36:11,433 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2020065027, now seen corresponding path program 321 times [2021-06-05 14:36:11,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:11,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202372600] [2021-06-05 14:36:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:11,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202372600] [2021-06-05 14:36:11,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202372600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046526507] [2021-06-05 14:36:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:11,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:36:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:11,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:11,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:11,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:11,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:11,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:12,055 INFO L628 ElimStorePlain]: treesize reduction 263, result has 23.5 percent of original size [2021-06-05 14:36:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:12,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 14:36:12,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:12,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:12,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:12,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-05 14:36:12,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:12,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:12,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:12,120 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-06-05 14:36:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:12,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046526507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:12,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:12,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821585130] [2021-06-05 14:36:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:12,223 INFO L87 Difference]: Start difference. First operand 478 states and 1308 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:12,797 INFO L93 Difference]: Finished difference Result 550 states and 1433 transitions. [2021-06-05 14:36:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:36:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:12,797 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:36:12,798 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:36:12,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:36:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:36:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 488. [2021-06-05 14:36:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.7412731006160165) internal successors, (1335), 487 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1335 transitions. [2021-06-05 14:36:12,802 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1335 transitions. Word has length 18 [2021-06-05 14:36:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:12,802 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1335 transitions. [2021-06-05 14:36:12,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1335 transitions. [2021-06-05 14:36:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:12,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:12,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:13,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6325,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,003 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash 283287295, now seen corresponding path program 322 times [2021-06-05 14:36:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:13,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067459074] [2021-06-05 14:36:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:13,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067459074] [2021-06-05 14:36:13,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067459074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562300505] [2021-06-05 14:36:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:13,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:13,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:13,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:13,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:13,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,605 INFO L628 ElimStorePlain]: treesize reduction 162, result has 31.6 percent of original size [2021-06-05 14:36:13,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:13,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:13,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:13,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:13,643 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:13,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:13,673 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:328, output treesize:40 [2021-06-05 14:36:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562300505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661553489] [2021-06-05 14:36:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:13,778 INFO L87 Difference]: Start difference. First operand 488 states and 1335 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:14,298 INFO L93 Difference]: Finished difference Result 535 states and 1405 transitions. [2021-06-05 14:36:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:14,299 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:36:14,299 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:36:14,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:36:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 488. [2021-06-05 14:36:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.7412731006160165) internal successors, (1335), 487 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1335 transitions. [2021-06-05 14:36:14,303 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1335 transitions. Word has length 18 [2021-06-05 14:36:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:14,303 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1335 transitions. [2021-06-05 14:36:14,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1335 transitions. [2021-06-05 14:36:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:14,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:14,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:14,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6349,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:14,504 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1032870009, now seen corresponding path program 323 times [2021-06-05 14:36:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407885927] [2021-06-05 14:36:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:14,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:14,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407885927] [2021-06-05 14:36:14,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407885927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:14,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682300270] [2021-06-05 14:36:14,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:14,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:36:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:14,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:14,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:14,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:14,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:14,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:14,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:14,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:14,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:14,984 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:36:14,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:14,985 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:36:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:15,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682300270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:15,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:15,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:15,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084020461] [2021-06-05 14:36:15,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:15,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:15,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:15,054 INFO L87 Difference]: Start difference. First operand 488 states and 1335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:15,636 INFO L93 Difference]: Finished difference Result 524 states and 1390 transitions. [2021-06-05 14:36:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:15,637 INFO L225 Difference]: With dead ends: 524 [2021-06-05 14:36:15,637 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:36:15,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:36:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:36:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 485. [2021-06-05 14:36:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.7417355371900825) internal successors, (1327), 484 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1327 transitions. [2021-06-05 14:36:15,641 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1327 transitions. Word has length 18 [2021-06-05 14:36:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:15,641 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1327 transitions. [2021-06-05 14:36:15,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1327 transitions. [2021-06-05 14:36:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:15,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:15,642 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:15,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6375 [2021-06-05 14:36:15,842 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1513718761, now seen corresponding path program 324 times [2021-06-05 14:36:15,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:15,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259033417] [2021-06-05 14:36:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259033417] [2021-06-05 14:36:16,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259033417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840153145] [2021-06-05 14:36:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:16,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:16,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:16,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:16,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:16,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:16,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:16,431 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-06-05 14:36:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840153145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:16,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:16,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674616909] [2021-06-05 14:36:16,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:16,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:16,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:16,537 INFO L87 Difference]: Start difference. First operand 485 states and 1327 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:17,051 INFO L93 Difference]: Finished difference Result 516 states and 1376 transitions. [2021-06-05 14:36:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:17,051 INFO L225 Difference]: With dead ends: 516 [2021-06-05 14:36:17,051 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:36:17,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:36:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:36:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 487. [2021-06-05 14:36:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-06-05 14:36:17,056 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-06-05 14:36:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:17,056 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-06-05 14:36:17,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-06-05 14:36:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:17,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:17,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:17,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6385 [2021-06-05 14:36:17,257 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash -223058971, now seen corresponding path program 325 times [2021-06-05 14:36:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:17,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544680843] [2021-06-05 14:36:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:17,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:17,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544680843] [2021-06-05 14:36:17,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544680843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:17,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494357544] [2021-06-05 14:36:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:17,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:17,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:17,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:17,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:17,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:17,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:17,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,055 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:36:18,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:18,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:18,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:18,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:18,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:18,117 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494357544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:18,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:18,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423532438] [2021-06-05 14:36:18,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:18,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:18,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:18,217 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:18,696 INFO L93 Difference]: Finished difference Result 515 states and 1375 transitions. [2021-06-05 14:36:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:18,697 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:36:18,697 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:36:18,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:36:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 487. [2021-06-05 14:36:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-06-05 14:36:18,701 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-06-05 14:36:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:18,701 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-06-05 14:36:18,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-06-05 14:36:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:18,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:18,702 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6396,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:18,902 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1539216275, now seen corresponding path program 326 times [2021-06-05 14:36:18,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:18,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255821209] [2021-06-05 14:36:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255821209] [2021-06-05 14:36:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255821209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305732996] [2021-06-05 14:36:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:19,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:19,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:19,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:19,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:19,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:19,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:19,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:19,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:19,680 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:36:19,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:19,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:19,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:19,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:19,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:19,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:19,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:19,740 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:36:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:19,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305732996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:19,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:19,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299108291] [2021-06-05 14:36:19,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:19,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:19,808 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:20,275 INFO L93 Difference]: Finished difference Result 505 states and 1360 transitions. [2021-06-05 14:36:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:20,276 INFO L225 Difference]: With dead ends: 505 [2021-06-05 14:36:20,276 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:36:20,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:36:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 487. [2021-06-05 14:36:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-06-05 14:36:20,281 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-06-05 14:36:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:20,281 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-06-05 14:36:20,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-06-05 14:36:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:20,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:20,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:20,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6421 [2021-06-05 14:36:20,482 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash 609580261, now seen corresponding path program 327 times [2021-06-05 14:36:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:20,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046595130] [2021-06-05 14:36:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046595130] [2021-06-05 14:36:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046595130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747803382] [2021-06-05 14:36:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:20,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:20,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:21,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:21,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:21,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,101 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:36:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:21,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:21,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:21,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:21,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:21,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:21,162 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:36:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747803382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:21,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:21,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482951772] [2021-06-05 14:36:21,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:21,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:21,229 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:21,543 INFO L93 Difference]: Finished difference Result 503 states and 1357 transitions. [2021-06-05 14:36:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:21,544 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:36:21,544 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:36:21,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:36:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 487. [2021-06-05 14:36:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.742798353909465) internal successors, (1333), 486 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1333 transitions. [2021-06-05 14:36:21,548 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1333 transitions. Word has length 18 [2021-06-05 14:36:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:21,548 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1333 transitions. [2021-06-05 14:36:21,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1333 transitions. [2021-06-05 14:36:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:21,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:21,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:21,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6448,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:21,749 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1298113597, now seen corresponding path program 328 times [2021-06-05 14:36:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:21,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513324579] [2021-06-05 14:36:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:21,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513324579] [2021-06-05 14:36:21,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513324579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:21,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321882251] [2021-06-05 14:36:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:22,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:22,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:22,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:22,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:22,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:22,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,401 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-06-05 14:36:22,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:22,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:22,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:22,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:22,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:22,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:22,465 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321882251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283016011] [2021-06-05 14:36:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:22,569 INFO L87 Difference]: Start difference. First operand 487 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:22,989 INFO L93 Difference]: Finished difference Result 521 states and 1388 transitions. [2021-06-05 14:36:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:22,990 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:36:22,990 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:36:22,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:36:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 490. [2021-06-05 14:36:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.7443762781186094) internal successors, (1342), 489 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1342 transitions. [2021-06-05 14:36:22,994 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1342 transitions. Word has length 18 [2021-06-05 14:36:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:22,994 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1342 transitions. [2021-06-05 14:36:22,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1342 transitions. [2021-06-05 14:36:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:22,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:22,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:23,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:23,209 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1260075967, now seen corresponding path program 329 times [2021-06-05 14:36:23,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:23,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496861359] [2021-06-05 14:36:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:23,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496861359] [2021-06-05 14:36:23,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496861359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438918399] [2021-06-05 14:36:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:23,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:23,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:23,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:23,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:23,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:23,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:23,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:23,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:23,732 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-06-05 14:36:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438918399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:23,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:23,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:23,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211368656] [2021-06-05 14:36:23,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:23,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:23,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:23,842 INFO L87 Difference]: Start difference. First operand 490 states and 1342 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:24,361 INFO L93 Difference]: Finished difference Result 520 states and 1387 transitions. [2021-06-05 14:36:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:24,362 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:36:24,362 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:36:24,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:36:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:36:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 490. [2021-06-05 14:36:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.7443762781186094) internal successors, (1342), 489 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1342 transitions. [2021-06-05 14:36:24,367 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1342 transitions. Word has length 18 [2021-06-05 14:36:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:24,367 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1342 transitions. [2021-06-05 14:36:24,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1342 transitions. [2021-06-05 14:36:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:24,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:24,367 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:24,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6491,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,568 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -56081337, now seen corresponding path program 330 times [2021-06-05 14:36:24,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:24,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613112547] [2021-06-05 14:36:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613112547] [2021-06-05 14:36:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613112547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805215731] [2021-06-05 14:36:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:25,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:25,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:25,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:25,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:25,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:25,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:25,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:25,130 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-06-05 14:36:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:25,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805215731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:25,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:25,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:25,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001473373] [2021-06-05 14:36:25,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:25,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:25,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:25,202 INFO L87 Difference]: Start difference. First operand 490 states and 1342 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:25,661 INFO L93 Difference]: Finished difference Result 510 states and 1372 transitions. [2021-06-05 14:36:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:25,662 INFO L225 Difference]: With dead ends: 510 [2021-06-05 14:36:25,662 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:36:25,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:36:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:36:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 489. [2021-06-05 14:36:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-06-05 14:36:25,666 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-06-05 14:36:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:25,666 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-06-05 14:36:25,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-06-05 14:36:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:25,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:25,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:25,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6501,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:25,867 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2092715199, now seen corresponding path program 331 times [2021-06-05 14:36:25,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:25,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024661130] [2021-06-05 14:36:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024661130] [2021-06-05 14:36:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024661130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072212164] [2021-06-05 14:36:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:26,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:26,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:26,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:26,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:26,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:26,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,536 INFO L628 ElimStorePlain]: treesize reduction 154, result has 31.6 percent of original size [2021-06-05 14:36:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:26,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:26,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:26,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:26,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:26,594 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:36:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072212164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:26,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:26,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011267704] [2021-06-05 14:36:26,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:26,663 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:27,001 INFO L93 Difference]: Finished difference Result 509 states and 1369 transitions. [2021-06-05 14:36:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:27,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:27,002 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:36:27,002 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:36:27,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:36:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 489. [2021-06-05 14:36:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-06-05 14:36:27,007 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-06-05 14:36:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:27,007 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-06-05 14:36:27,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-06-05 14:36:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:27,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:27,008 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:27,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6510 [2021-06-05 14:36:27,221 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -14068921, now seen corresponding path program 332 times [2021-06-05 14:36:27,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:27,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556937248] [2021-06-05 14:36:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:27,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556937248] [2021-06-05 14:36:27,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556937248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207362782] [2021-06-05 14:36:27,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:27,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:27,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:27,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:27,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:27,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:27,941 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:36:27,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:27,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:27,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:27,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:27,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:27,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:28,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:28,001 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:36:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:28,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207362782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:28,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:28,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920576437] [2021-06-05 14:36:28,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:28,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:28,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:28,078 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:28,378 INFO L93 Difference]: Finished difference Result 507 states and 1366 transitions. [2021-06-05 14:36:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:28,379 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:36:28,379 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:36:28,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:36:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 489. [2021-06-05 14:36:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.7438524590163933) internal successors, (1339), 488 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1339 transitions. [2021-06-05 14:36:28,383 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1339 transitions. Word has length 18 [2021-06-05 14:36:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:28,383 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1339 transitions. [2021-06-05 14:36:28,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1339 transitions. [2021-06-05 14:36:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:28,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:28,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6535,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,584 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash -784162003, now seen corresponding path program 333 times [2021-06-05 14:36:28,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545660611] [2021-06-05 14:36:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545660611] [2021-06-05 14:36:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545660611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211847794] [2021-06-05 14:36:29,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:36:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:29,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:29,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:36:29,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:29,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:29,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:29,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:29,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:29,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:36:29,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:36:29,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:29,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:29,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:29,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:36:29,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:29,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:29,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:29,539 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:516, output treesize:41 [2021-06-05 14:36:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211847794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:29,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:29,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163591917] [2021-06-05 14:36:29,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:29,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:29,609 INFO L87 Difference]: Start difference. First operand 489 states and 1339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,154 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 14:36:31,174 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:36:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:31,232 INFO L93 Difference]: Finished difference Result 714 states and 1771 transitions. [2021-06-05 14:36:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:36:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:31,233 INFO L225 Difference]: With dead ends: 714 [2021-06-05 14:36:31,233 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:36:31,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1891.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:36:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:36:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 499. [2021-06-05 14:36:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.7610441767068274) internal successors, (1375), 498 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1375 transitions. [2021-06-05 14:36:31,238 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1375 transitions. Word has length 18 [2021-06-05 14:36:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:31,238 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1375 transitions. [2021-06-05 14:36:31,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1375 transitions. [2021-06-05 14:36:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:31,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:31,239 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:31,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6562,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,439 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:31,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1440927767, now seen corresponding path program 334 times [2021-06-05 14:36:31,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:31,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334257294] [2021-06-05 14:36:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:31,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334257294] [2021-06-05 14:36:31,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334257294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986132574] [2021-06-05 14:36:31,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:31,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:32,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:32,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:32,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:32,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:32,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:32,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:36:32,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:32,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:32,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:36:32,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:32,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:32,206 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:32,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:32,210 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:32,262 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-06-05 14:36:32,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:32,264 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:36:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986132574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:36:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658087998] [2021-06-05 14:36:32,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:32,317 INFO L87 Difference]: Start difference. First operand 499 states and 1375 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,901 INFO L93 Difference]: Finished difference Result 614 states and 1565 transitions. [2021-06-05 14:36:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:36:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,902 INFO L225 Difference]: With dead ends: 614 [2021-06-05 14:36:32,902 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:36:32,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 795.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:36:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 502. [2021-06-05 14:36:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7624750499001998) internal successors, (1384), 501 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1384 transitions. [2021-06-05 14:36:32,911 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1384 transitions. Word has length 18 [2021-06-05 14:36:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,911 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1384 transitions. [2021-06-05 14:36:32,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1384 transitions. [2021-06-05 14:36:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:32,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6617,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,113 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1046471763, now seen corresponding path program 335 times [2021-06-05 14:36:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979221168] [2021-06-05 14:36:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979221168] [2021-06-05 14:36:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979221168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517556457] [2021-06-05 14:36:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:36:33,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:33,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:33,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:33,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:33,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:33,733 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:33,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:33,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:33,752 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:117, output treesize:40 [2021-06-05 14:36:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517556457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:33,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080430722] [2021-06-05 14:36:33,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:33,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:33,859 INFO L87 Difference]: Start difference. First operand 502 states and 1384 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,677 INFO L93 Difference]: Finished difference Result 627 states and 1584 transitions. [2021-06-05 14:36:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:36:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,678 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:36:34,678 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 14:36:34,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:36:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 14:36:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 504. [2021-06-05 14:36:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.7673956262425445) internal successors, (1392), 503 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1392 transitions. [2021-06-05 14:36:34,683 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1392 transitions. Word has length 18 [2021-06-05 14:36:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,683 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1392 transitions. [2021-06-05 14:36:34,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1392 transitions. [2021-06-05 14:36:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:34,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,684 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:34,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6678 [2021-06-05 14:36:34,884 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1511717801, now seen corresponding path program 336 times [2021-06-05 14:36:34,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:34,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831602524] [2021-06-05 14:36:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831602524] [2021-06-05 14:36:35,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831602524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306752497] [2021-06-05 14:36:35,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:35,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:35,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:35,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:35,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:35,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:35,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:35,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:35,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:35,336 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:36:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306752497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449267901] [2021-06-05 14:36:35,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:35,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:35,443 INFO L87 Difference]: Start difference. First operand 504 states and 1392 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,231 INFO L93 Difference]: Finished difference Result 597 states and 1537 transitions. [2021-06-05 14:36:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:36:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,232 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:36:36,232 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:36:36,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 902.9ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:36:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:36:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 504. [2021-06-05 14:36:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.7673956262425445) internal successors, (1392), 503 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1392 transitions. [2021-06-05 14:36:36,237 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1392 transitions. Word has length 18 [2021-06-05 14:36:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,237 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1392 transitions. [2021-06-05 14:36:36,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1392 transitions. [2021-06-05 14:36:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:36,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,237 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6687,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,438 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1014962451, now seen corresponding path program 337 times [2021-06-05 14:36:36,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252428951] [2021-06-05 14:36:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252428951] [2021-06-05 14:36:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252428951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662061584] [2021-06-05 14:36:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:36,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:36,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:36,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:36,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:36,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:36,999 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:36:37,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:37,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:37,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:37,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:37,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:37,063 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662061584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:36:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156985019] [2021-06-05 14:36:37,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:37,170 INFO L87 Difference]: Start difference. First operand 504 states and 1392 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,647 INFO L93 Difference]: Finished difference Result 605 states and 1565 transitions. [2021-06-05 14:36:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,649 INFO L225 Difference]: With dead ends: 605 [2021-06-05 14:36:37,649 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:36:37,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:36:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 509. [2021-06-05 14:36:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.77755905511811) internal successors, (1411), 508 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1411 transitions. [2021-06-05 14:36:37,653 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1411 transitions. Word has length 18 [2021-06-05 14:36:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,653 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1411 transitions. [2021-06-05 14:36:37,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1411 transitions. [2021-06-05 14:36:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:37,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,654 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6697 [2021-06-05 14:36:37,854 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1543227113, now seen corresponding path program 338 times [2021-06-05 14:36:37,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744310091] [2021-06-05 14:36:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:38,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744310091] [2021-06-05 14:36:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744310091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510882865] [2021-06-05 14:36:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:38,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:38,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:38,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:38,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:38,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,508 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:36:38,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:38,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:38,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:38,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:38,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:38,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:38,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:38,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510882865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:36:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383996164] [2021-06-05 14:36:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:38,635 INFO L87 Difference]: Start difference. First operand 509 states and 1411 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,061 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-06-05 14:36:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:39,086 INFO L93 Difference]: Finished difference Result 589 states and 1541 transitions. [2021-06-05 14:36:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:39,087 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:36:39,087 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 14:36:39,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 14:36:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 507. [2021-06-05 14:36:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.772727272727273) internal successors, (1403), 506 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1403 transitions. [2021-06-05 14:36:39,092 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1403 transitions. Word has length 18 [2021-06-05 14:36:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,092 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1403 transitions. [2021-06-05 14:36:39,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1403 transitions. [2021-06-05 14:36:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:39,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,093 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6721,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,293 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 227069809, now seen corresponding path program 339 times [2021-06-05 14:36:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240453149] [2021-06-05 14:36:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240453149] [2021-06-05 14:36:39,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240453149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999082314] [2021-06-05 14:36:39,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:39,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:39,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:40,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:40,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:40,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:36:40,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:40,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:36:40,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:40,137 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:36:40,141 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:36:40,145 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:40,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:40,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:40,181 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:415, output treesize:41 [2021-06-05 14:36:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999082314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:36:40,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616250792] [2021-06-05 14:36:40,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:36:40,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:36:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:40,252 INFO L87 Difference]: Start difference. First operand 507 states and 1403 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,845 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:36:41,341 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 14:36:41,633 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-06-05 14:36:41,787 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 14:36:41,981 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 14:36:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,016 INFO L93 Difference]: Finished difference Result 629 states and 1603 transitions. [2021-06-05 14:36:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:36:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,017 INFO L225 Difference]: With dead ends: 629 [2021-06-05 14:36:42,017 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 14:36:42,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1847.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:36:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 14:36:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 509. [2021-06-05 14:36:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.7559055118110236) internal successors, (1400), 508 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1400 transitions. [2021-06-05 14:36:42,021 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1400 transitions. Word has length 18 [2021-06-05 14:36:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,021 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1400 transitions. [2021-06-05 14:36:42,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1400 transitions. [2021-06-05 14:36:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:42,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6747,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,222 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -464139095, now seen corresponding path program 340 times [2021-06-05 14:36:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862219851] [2021-06-05 14:36:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862219851] [2021-06-05 14:36:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862219851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116174674] [2021-06-05 14:36:42,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:42,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:42,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:42,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:42,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:42,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:42,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:42,845 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:42,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:42,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:36:42,858 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:36:42,862 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:42,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:42,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:42,923 INFO L628 ElimStorePlain]: treesize reduction 23, result has 72.0 percent of original size [2021-06-05 14:36:42,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:42,925 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:36:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116174674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:36:42,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191239275] [2021-06-05 14:36:42,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:42,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:42,978 INFO L87 Difference]: Start difference. First operand 509 states and 1400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:43,380 INFO L93 Difference]: Finished difference Result 595 states and 1562 transitions. [2021-06-05 14:36:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:36:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:43,381 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:36:43,381 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 14:36:43,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 14:36:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 517. [2021-06-05 14:36:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.7655038759689923) internal successors, (1427), 516 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1427 transitions. [2021-06-05 14:36:43,386 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1427 transitions. Word has length 18 [2021-06-05 14:36:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:43,386 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1427 transitions. [2021-06-05 14:36:43,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1427 transitions. [2021-06-05 14:36:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:43,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:43,387 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:43,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6814 [2021-06-05 14:36:43,587 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:43,587 INFO L82 PathProgramCache]: Analyzing trace with hash -69683091, now seen corresponding path program 341 times [2021-06-05 14:36:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:43,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130822746] [2021-06-05 14:36:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:43,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130822746] [2021-06-05 14:36:43,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130822746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916904508] [2021-06-05 14:36:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:36:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:44,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:44,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:44,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:44,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:44,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:44,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:44,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:44,063 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:36:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916904508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:44,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:36:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716569934] [2021-06-05 14:36:44,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:36:44,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:36:44,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:44,164 INFO L87 Difference]: Start difference. First operand 517 states and 1427 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:44,662 INFO L93 Difference]: Finished difference Result 626 states and 1610 transitions. [2021-06-05 14:36:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:36:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:44,663 INFO L225 Difference]: With dead ends: 626 [2021-06-05 14:36:44,663 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:36:44,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 631.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:36:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 519. [2021-06-05 14:36:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.77027027027027) internal successors, (1435), 518 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1435 transitions. [2021-06-05 14:36:44,668 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1435 transitions. Word has length 18 [2021-06-05 14:36:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:44,668 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1435 transitions. [2021-06-05 14:36:44,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1435 transitions. [2021-06-05 14:36:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:44,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:44,669 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:44,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6893,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,869 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:44,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1806460823, now seen corresponding path program 342 times [2021-06-05 14:36:44,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:44,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407342281] [2021-06-05 14:36:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:45,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407342281] [2021-06-05 14:36:45,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407342281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781949522] [2021-06-05 14:36:45,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:45,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:45,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:45,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:45,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:45,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:45,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:45,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:45,275 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:45,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:45,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:45,293 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:170, output treesize:40 [2021-06-05 14:36:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781949522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:45,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:36:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978379708] [2021-06-05 14:36:45,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:36:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:36:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:45,392 INFO L87 Difference]: Start difference. First operand 519 states and 1435 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:45,879 INFO L93 Difference]: Finished difference Result 605 states and 1579 transitions. [2021-06-05 14:36:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:36:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:45,880 INFO L225 Difference]: With dead ends: 605 [2021-06-05 14:36:45,880 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:36:45,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:36:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 518. [2021-06-05 14:36:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.7678916827853) internal successors, (1431), 517 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1431 transitions. [2021-06-05 14:36:45,885 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1431 transitions. Word has length 18 [2021-06-05 14:36:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:45,885 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1431 transitions. [2021-06-05 14:36:45,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1431 transitions. [2021-06-05 14:36:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:45,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:45,885 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:46,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6903 [2021-06-05 14:36:46,086 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash 468172487, now seen corresponding path program 343 times [2021-06-05 14:36:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:46,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957640477] [2021-06-05 14:36:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:46,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957640477] [2021-06-05 14:36:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957640477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546872257] [2021-06-05 14:36:46,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:46,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:36:46,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:46,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:46,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:46,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:46,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,664 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-06-05 14:36:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:46,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:46,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:46,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:46,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:46,726 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546872257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:46,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:36:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567082789] [2021-06-05 14:36:46,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:46,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:46,826 INFO L87 Difference]: Start difference. First operand 518 states and 1431 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:47,390 INFO L93 Difference]: Finished difference Result 573 states and 1523 transitions. [2021-06-05 14:36:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:47,391 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:36:47,391 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:36:47,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:36:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:36:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 518. [2021-06-05 14:36:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.765957446808511) internal successors, (1430), 517 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1430 transitions. [2021-06-05 14:36:47,395 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1430 transitions. Word has length 18 [2021-06-05 14:36:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:47,395 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1430 transitions. [2021-06-05 14:36:47,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1430 transitions. [2021-06-05 14:36:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:47,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:47,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:47,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6913,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:47,596 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1268605245, now seen corresponding path program 344 times [2021-06-05 14:36:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:47,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526826589] [2021-06-05 14:36:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:47,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526826589] [2021-06-05 14:36:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526826589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726429516] [2021-06-05 14:36:47,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:48,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:48,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:48,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:48,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:48,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,128 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:36:48,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:48,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:48,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:48,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:48,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:48,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:48,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726429516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:48,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:36:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464305906] [2021-06-05 14:36:48,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:36:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:36:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:48,290 INFO L87 Difference]: Start difference. First operand 518 states and 1430 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:48,885 INFO L93 Difference]: Finished difference Result 575 states and 1522 transitions. [2021-06-05 14:36:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:48,886 INFO L225 Difference]: With dead ends: 575 [2021-06-05 14:36:48,886 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:36:48,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:36:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:36:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 518. [2021-06-05 14:36:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.765957446808511) internal successors, (1430), 517 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1430 transitions. [2021-06-05 14:36:48,891 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1430 transitions. Word has length 18 [2021-06-05 14:36:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:48,891 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1430 transitions. [2021-06-05 14:36:48,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1430 transitions. [2021-06-05 14:36:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:48,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:48,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:49,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6938 [2021-06-05 14:36:49,092 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1710204747, now seen corresponding path program 345 times [2021-06-05 14:36:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:49,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417390259] [2021-06-05 14:36:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:49,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417390259] [2021-06-05 14:36:49,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417390259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115486001] [2021-06-05 14:36:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:49,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:49,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:36:49,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:36:49,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:49,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:49,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:49,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:36:49,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:49,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:36:49,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:49,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:49,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:49,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:49,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:49,851 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:415, output treesize:41 [2021-06-05 14:36:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115486001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:49,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:36:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216355430] [2021-06-05 14:36:49,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:36:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:36:49,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:49,922 INFO L87 Difference]: Start difference. First operand 518 states and 1430 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,493 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 14:36:50,958 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 14:36:51,099 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 14:36:51,346 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 14:36:51,494 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 14:36:51,641 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 14:36:51,903 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 14:36:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:51,943 INFO L93 Difference]: Finished difference Result 653 states and 1659 transitions. [2021-06-05 14:36:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:36:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:51,944 INFO L225 Difference]: With dead ends: 653 [2021-06-05 14:36:51,944 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:36:51,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1987.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:36:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:36:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 518. [2021-06-05 14:36:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.756286266924565) internal successors, (1425), 517 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1425 transitions. [2021-06-05 14:36:51,949 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1425 transitions. Word has length 18 [2021-06-05 14:36:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:51,949 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1425 transitions. [2021-06-05 14:36:51,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1425 transitions. [2021-06-05 14:36:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:51,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:51,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:52,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6963,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,150 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash -38173779, now seen corresponding path program 346 times [2021-06-05 14:36:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:52,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440555539] [2021-06-05 14:36:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440555539] [2021-06-05 14:36:52,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440555539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935437803] [2021-06-05 14:36:52,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:52,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:52,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:52,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:52,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:36:52,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:52,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:36:52,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,760 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-06-05 14:36:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:52,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:52,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:52,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:52,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:52,824 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:36:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935437803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:52,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:36:52,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80881494] [2021-06-05 14:36:52,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:36:52,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:36:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:52,927 INFO L87 Difference]: Start difference. First operand 518 states and 1425 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:53,532 INFO L93 Difference]: Finished difference Result 572 states and 1507 transitions. [2021-06-05 14:36:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:53,533 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:36:53,533 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:36:53,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:36:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:36:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 518. [2021-06-05 14:36:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.756286266924565) internal successors, (1425), 517 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1425 transitions. [2021-06-05 14:36:53,537 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1425 transitions. Word has length 18 [2021-06-05 14:36:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:53,537 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1425 transitions. [2021-06-05 14:36:53,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1425 transitions. [2021-06-05 14:36:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:53,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:53,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:53,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7031,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:53,738 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1774951511, now seen corresponding path program 347 times [2021-06-05 14:36:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:53,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305823002] [2021-06-05 14:36:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:53,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305823002] [2021-06-05 14:36:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305823002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399597451] [2021-06-05 14:36:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:53,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:36:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:54,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:54,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:54,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:54,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:36:54,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:54,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:54,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:54,200 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:54,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:54,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:54,219 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:170, output treesize:40 [2021-06-05 14:36:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399597451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:54,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:36:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035154105] [2021-06-05 14:36:54,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:36:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:36:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:54,331 INFO L87 Difference]: Start difference. First operand 518 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:54,827 INFO L93 Difference]: Finished difference Result 571 states and 1506 transitions. [2021-06-05 14:36:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:36:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:54,828 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:36:54,828 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 14:36:54,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 14:36:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 521. [2021-06-05 14:36:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.7576923076923077) internal successors, (1434), 520 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1434 transitions. [2021-06-05 14:36:54,833 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1434 transitions. Word has length 18 [2021-06-05 14:36:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:54,833 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1434 transitions. [2021-06-05 14:36:54,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1434 transitions. [2021-06-05 14:36:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:54,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:54,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:55,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7056 [2021-06-05 14:36:55,057 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1203858481, now seen corresponding path program 348 times [2021-06-05 14:36:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:55,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004800939] [2021-06-05 14:36:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:55,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004800939] [2021-06-05 14:36:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004800939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192783714] [2021-06-05 14:36:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:55,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:36:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:55,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:36:55,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:55,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:55,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:36:55,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:36:55,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:36:55,783 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:36:55,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:55,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:55,813 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:36:55,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:36:55,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:55,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:36:55,829 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:55,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:55,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:55,871 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:566, output treesize:41 [2021-06-05 14:36:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192783714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:36:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903983944] [2021-06-05 14:36:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:36:55,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:36:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:55,953 INFO L87 Difference]: Start difference. First operand 521 states and 1434 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,887 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 14:36:57,266 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 14:36:57,424 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 14:36:57,698 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 14:36:57,858 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 14:36:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:57,913 INFO L93 Difference]: Finished difference Result 648 states and 1649 transitions. [2021-06-05 14:36:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:36:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:57,914 INFO L225 Difference]: With dead ends: 648 [2021-06-05 14:36:57,914 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 14:36:57,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1943.2ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:36:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 14:36:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 521. [2021-06-05 14:36:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.753846153846154) internal successors, (1432), 520 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1432 transitions. [2021-06-05 14:36:57,919 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1432 transitions. Word has length 18 [2021-06-05 14:36:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:57,920 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1432 transitions. [2021-06-05 14:36:57,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1432 transitions. [2021-06-05 14:36:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:57,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:57,920 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7066 [2021-06-05 14:36:58,121 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash -942312279, now seen corresponding path program 349 times [2021-06-05 14:36:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:58,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852815545] [2021-06-05 14:36:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852815545] [2021-06-05 14:36:58,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852815545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370491694] [2021-06-05 14:36:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:58,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:58,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:58,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:58,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:36:58,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:36:58,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,775 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-06-05 14:36:58,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:58,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:58,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:36:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:36:58,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:58,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:36:58,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:58,835 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:36:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370491694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:58,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:36:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326617018] [2021-06-05 14:36:58,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:36:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:36:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:58,903 INFO L87 Difference]: Start difference. First operand 521 states and 1432 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:59,274 INFO L93 Difference]: Finished difference Result 560 states and 1489 transitions. [2021-06-05 14:36:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:36:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:59,275 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:36:59,275 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:36:59,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:36:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 521. [2021-06-05 14:36:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.753846153846154) internal successors, (1432), 520 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1432 transitions. [2021-06-05 14:36:59,279 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1432 transitions. Word has length 18 [2021-06-05 14:36:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:59,279 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1432 transitions. [2021-06-05 14:36:59,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1432 transitions. [2021-06-05 14:36:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:36:59,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:59,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:59,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7097,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,480 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1731596273, now seen corresponding path program 350 times [2021-06-05 14:36:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:59,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006681691] [2021-06-05 14:36:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006681691] [2021-06-05 14:36:59,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006681691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344412949] [2021-06-05 14:36:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:00,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:00,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:00,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:00,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:00,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:37:00,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:00,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:00,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:37:00,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:00,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:00,087 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:00,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:00,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:00,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:00,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:00,129 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:450, output treesize:41 [2021-06-05 14:37:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344412949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707648630] [2021-06-05 14:37:00,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:00,198 INFO L87 Difference]: Start difference. First operand 521 states and 1432 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:00,688 INFO L93 Difference]: Finished difference Result 625 states and 1621 transitions. [2021-06-05 14:37:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:37:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:00,689 INFO L225 Difference]: With dead ends: 625 [2021-06-05 14:37:00,689 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 14:37:00,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 14:37:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 527. [2021-06-05 14:37:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.76425855513308) internal successors, (1454), 526 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1454 transitions. [2021-06-05 14:37:00,694 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1454 transitions. Word has length 18 [2021-06-05 14:37:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:00,694 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1454 transitions. [2021-06-05 14:37:00,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1454 transitions. [2021-06-05 14:37:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:00,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:00,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:00,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7120 [2021-06-05 14:37:00,895 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1337140269, now seen corresponding path program 351 times [2021-06-05 14:37:00,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:00,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398463160] [2021-06-05 14:37:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:01,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398463160] [2021-06-05 14:37:01,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398463160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187501533] [2021-06-05 14:37:01,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:37:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:37:01,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2021-06-05 14:37:01,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:01,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:37:01,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:37:01,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:37:01,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:37:01,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 14:37:01,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:37:01,571 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:01,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:01,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:01,599 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:352, output treesize:40 [2021-06-05 14:37:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187501533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:01,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:01,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402167797] [2021-06-05 14:37:01,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:01,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:01,702 INFO L87 Difference]: Start difference. First operand 527 states and 1454 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,035 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 14:37:03,313 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 14:37:03,577 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 14:37:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:03,608 INFO L93 Difference]: Finished difference Result 820 states and 2015 transitions. [2021-06-05 14:37:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:37:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:03,613 INFO L225 Difference]: With dead ends: 820 [2021-06-05 14:37:03,613 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:37:03,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2000.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:37:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 546. [2021-06-05 14:37:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7504587155963303) internal successors, (1499), 545 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1499 transitions. [2021-06-05 14:37:03,621 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1499 transitions. Word has length 18 [2021-06-05 14:37:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:03,621 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1499 transitions. [2021-06-05 14:37:03,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1499 transitions. [2021-06-05 14:37:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:03,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:03,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:03,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7187,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,837 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1221049295, now seen corresponding path program 352 times [2021-06-05 14:37:03,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:03,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229711763] [2021-06-05 14:37:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:04,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229711763] [2021-06-05 14:37:04,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229711763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967072280] [2021-06-05 14:37:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:04,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:37:04,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:04,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:37:04,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:04,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:04,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:04,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:04,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:04,474 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:04,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:04,477 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:04,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:04,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:04,505 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:322, output treesize:40 [2021-06-05 14:37:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967072280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:04,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:04,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106019470] [2021-06-05 14:37:04,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:04,604 INFO L87 Difference]: Start difference. First operand 546 states and 1499 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:04,995 INFO L93 Difference]: Finished difference Result 619 states and 1617 transitions. [2021-06-05 14:37:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:04,996 INFO L225 Difference]: With dead ends: 619 [2021-06-05 14:37:04,996 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:37:04,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:37:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 548. [2021-06-05 14:37:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.7513711151736744) internal successors, (1505), 547 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1505 transitions. [2021-06-05 14:37:05,001 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1505 transitions. Word has length 18 [2021-06-05 14:37:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:05,001 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1505 transitions. [2021-06-05 14:37:05,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1505 transitions. [2021-06-05 14:37:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:05,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:05,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:05,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7239,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,202 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -799284691, now seen corresponding path program 353 times [2021-06-05 14:37:05,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:05,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942320655] [2021-06-05 14:37:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942320655] [2021-06-05 14:37:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942320655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667782584] [2021-06-05 14:37:05,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:37:05,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:05,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:05,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:05,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:05,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:05,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:05,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:05,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:05,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:05,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:05,628 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:180, output treesize:40 [2021-06-05 14:37:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667782584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:05,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:05,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432516772] [2021-06-05 14:37:05,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:05,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:05,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:05,732 INFO L87 Difference]: Start difference. First operand 548 states and 1505 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:06,300 INFO L93 Difference]: Finished difference Result 597 states and 1577 transitions. [2021-06-05 14:37:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:06,301 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:37:06,301 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 14:37:06,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:37:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 14:37:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 548. [2021-06-05 14:37:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.7513711151736744) internal successors, (1505), 547 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1505 transitions. [2021-06-05 14:37:06,310 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1505 transitions. Word has length 18 [2021-06-05 14:37:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:06,310 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1505 transitions. [2021-06-05 14:37:06,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1505 transitions. [2021-06-05 14:37:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:06,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:06,311 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:06,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7290,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:06,511 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1758904873, now seen corresponding path program 354 times [2021-06-05 14:37:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701365632] [2021-06-05 14:37:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701365632] [2021-06-05 14:37:06,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701365632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674312780] [2021-06-05 14:37:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:06,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:06,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:37:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:07,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:37:07,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:07,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:37:07,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:37:07,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2021-06-05 14:37:07,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:07,132 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:37:07,137 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2021-06-05 14:37:07,141 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:07,145 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:37:07,150 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:07,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:37:07,156 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:07,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:07,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:07,184 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:40 [2021-06-05 14:37:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674312780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:07,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:07,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776161561] [2021-06-05 14:37:07,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:07,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:07,290 INFO L87 Difference]: Start difference. First operand 548 states and 1505 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,071 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 14:37:08,574 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 14:37:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:08,928 INFO L93 Difference]: Finished difference Result 706 states and 1767 transitions. [2021-06-05 14:37:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:37:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:08,929 INFO L225 Difference]: With dead ends: 706 [2021-06-05 14:37:08,929 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 14:37:08,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1695.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:37:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 14:37:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 541. [2021-06-05 14:37:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.748148148148148) internal successors, (1484), 540 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1484 transitions. [2021-06-05 14:37:08,935 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1484 transitions. Word has length 18 [2021-06-05 14:37:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:08,935 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1484 transitions. [2021-06-05 14:37:08,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1484 transitions. [2021-06-05 14:37:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:08,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:08,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:09,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7298 [2021-06-05 14:37:09,136 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 442747569, now seen corresponding path program 355 times [2021-06-05 14:37:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017276760] [2021-06-05 14:37:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:09,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017276760] [2021-06-05 14:37:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017276760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568965601] [2021-06-05 14:37:09,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:09,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:09,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:09,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:09,756 INFO L628 ElimStorePlain]: treesize reduction 164, result has 32.2 percent of original size [2021-06-05 14:37:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:09,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:09,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:09,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:09,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:09,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:09,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:09,815 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:37:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568965601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:09,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:09,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666792994] [2021-06-05 14:37:09,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:09,882 INFO L87 Difference]: Start difference. First operand 541 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:10,446 INFO L93 Difference]: Finished difference Result 579 states and 1541 transitions. [2021-06-05 14:37:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:10,447 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:37:10,447 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:37:10,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 709.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:37:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 540. [2021-06-05 14:37:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.749536178107607) internal successors, (1482), 539 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1482 transitions. [2021-06-05 14:37:10,452 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1482 transitions. Word has length 18 [2021-06-05 14:37:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:10,452 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1482 transitions. [2021-06-05 14:37:10,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1482 transitions. [2021-06-05 14:37:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:10,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:10,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:10,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,653 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1305630957, now seen corresponding path program 356 times [2021-06-05 14:37:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348220079] [2021-06-05 14:37:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:10,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348220079] [2021-06-05 14:37:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348220079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592597899] [2021-06-05 14:37:10,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:11,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:11,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:11,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:11,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:11,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,274 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.1 percent of original size [2021-06-05 14:37:11,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:11,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:11,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:11,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:11,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:11,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:11,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:11,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592597899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:11,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:11,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697632551] [2021-06-05 14:37:11,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:11,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:11,441 INFO L87 Difference]: Start difference. First operand 540 states and 1482 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:11,894 INFO L93 Difference]: Finished difference Result 577 states and 1541 transitions. [2021-06-05 14:37:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:11,895 INFO L225 Difference]: With dead ends: 577 [2021-06-05 14:37:11,895 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:37:11,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:37:11,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 542. [2021-06-05 14:37:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.7504621072088726) internal successors, (1488), 541 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1488 transitions. [2021-06-05 14:37:11,901 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1488 transitions. Word has length 18 [2021-06-05 14:37:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:11,901 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1488 transitions. [2021-06-05 14:37:11,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1488 transitions. [2021-06-05 14:37:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:11,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:11,902 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:12,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7395 [2021-06-05 14:37:12,102 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:12,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:12,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1252558607, now seen corresponding path program 357 times [2021-06-05 14:37:12,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:12,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109935971] [2021-06-05 14:37:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109935971] [2021-06-05 14:37:12,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109935971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798858055] [2021-06-05 14:37:12,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:12,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:12,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2021-06-05 14:37:12,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:37:12,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 14:37:12,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-06-05 14:37:12,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,802 INFO L628 ElimStorePlain]: treesize reduction 285, result has 22.6 percent of original size [2021-06-05 14:37:12,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-06-05 14:37:12,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-06-05 14:37:12,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:12,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:12,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:12,866 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-06-05 14:37:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798858055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:12,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:12,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103597662] [2021-06-05 14:37:12,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:12,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:12,968 INFO L87 Difference]: Start difference. First operand 542 states and 1488 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:13,570 INFO L93 Difference]: Finished difference Result 598 states and 1577 transitions. [2021-06-05 14:37:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:13,571 INFO L225 Difference]: With dead ends: 598 [2021-06-05 14:37:13,571 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:37:13,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:37:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:37:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 546. [2021-06-05 14:37:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-06-05 14:37:13,576 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-06-05 14:37:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:13,576 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-06-05 14:37:13,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-06-05 14:37:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:13,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:13,577 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:13,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7419,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,777 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -63598697, now seen corresponding path program 358 times [2021-06-05 14:37:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:13,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959872556] [2021-06-05 14:37:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959872556] [2021-06-05 14:37:13,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959872556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008448544] [2021-06-05 14:37:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:14,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:14,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:14,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:14,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:14,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,411 INFO L628 ElimStorePlain]: treesize reduction 265, result has 22.7 percent of original size [2021-06-05 14:37:14,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:14,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:14,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:14,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:14,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:14,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:14,470 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008448544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:14,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:14,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426777548] [2021-06-05 14:37:14,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:14,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:14,538 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:14,912 INFO L93 Difference]: Finished difference Result 570 states and 1538 transitions. [2021-06-05 14:37:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:14,913 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:37:14,913 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:37:14,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:37:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 546. [2021-06-05 14:37:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-06-05 14:37:14,918 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-06-05 14:37:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:14,918 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-06-05 14:37:14,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-06-05 14:37:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:14,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:14,919 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:15,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7442 [2021-06-05 14:37:15,119 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2085197839, now seen corresponding path program 359 times [2021-06-05 14:37:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:15,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019664329] [2021-06-05 14:37:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019664329] [2021-06-05 14:37:15,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019664329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621805388] [2021-06-05 14:37:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:15,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:15,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:15,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:15,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:15,707 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:15,743 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:37:15,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:15,744 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:37:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621805388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:15,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:15,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385226320] [2021-06-05 14:37:15,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:15,814 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:16,131 INFO L93 Difference]: Finished difference Result 568 states and 1535 transitions. [2021-06-05 14:37:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:16,132 INFO L225 Difference]: With dead ends: 568 [2021-06-05 14:37:16,132 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 14:37:16,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 14:37:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2021-06-05 14:37:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.7541284403669724) internal successors, (1501), 545 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1501 transitions. [2021-06-05 14:37:16,136 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1501 transitions. Word has length 18 [2021-06-05 14:37:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:16,136 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1501 transitions. [2021-06-05 14:37:16,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1501 transitions. [2021-06-05 14:37:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:16,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:16,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:16,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7465 [2021-06-05 14:37:16,338 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:16,338 INFO L82 PathProgramCache]: Analyzing trace with hash 177503981, now seen corresponding path program 360 times [2021-06-05 14:37:16,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:16,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112730425] [2021-06-05 14:37:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:16,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112730425] [2021-06-05 14:37:16,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112730425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209834249] [2021-06-05 14:37:16,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:16,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:16,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:16,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:16,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:16,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:16,991 INFO L628 ElimStorePlain]: treesize reduction 239, result has 24.4 percent of original size [2021-06-05 14:37:16,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:16,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:17,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:17,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:17,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:17,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:17,055 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:448, output treesize:40 [2021-06-05 14:37:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209834249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:17,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:17,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934465258] [2021-06-05 14:37:17,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:17,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:17,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:17,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:17,166 INFO L87 Difference]: Start difference. First operand 546 states and 1501 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:17,592 INFO L93 Difference]: Finished difference Result 586 states and 1566 transitions. [2021-06-05 14:37:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:17,593 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:37:17,593 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:37:17,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:37:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 549. [2021-06-05 14:37:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-06-05 14:37:17,598 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-06-05 14:37:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:17,598 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-06-05 14:37:17,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-06-05 14:37:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:17,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:17,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:17,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7475 [2021-06-05 14:37:17,799 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:17,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1559273751, now seen corresponding path program 361 times [2021-06-05 14:37:17,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:17,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431650835] [2021-06-05 14:37:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431650835] [2021-06-05 14:37:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431650835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250202198] [2021-06-05 14:37:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:18,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:18,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:18,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:18,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:18,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,434 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-06-05 14:37:18,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:18,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:18,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:18,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:18,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:18,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:18,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:18,496 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250202198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:18,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:18,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528278667] [2021-06-05 14:37:18,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:18,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:18,598 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:18,982 INFO L93 Difference]: Finished difference Result 585 states and 1565 transitions. [2021-06-05 14:37:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:18,983 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:37:18,984 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:37:18,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:37:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 549. [2021-06-05 14:37:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-06-05 14:37:18,988 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-06-05 14:37:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:18,988 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-06-05 14:37:18,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-06-05 14:37:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:18,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:18,989 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:19,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7501 [2021-06-05 14:37:19,189 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1419536241, now seen corresponding path program 362 times [2021-06-05 14:37:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:19,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122230041] [2021-06-05 14:37:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:19,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122230041] [2021-06-05 14:37:19,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122230041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649852747] [2021-06-05 14:37:19,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:19,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:19,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:19,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:19,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:19,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:19,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:19,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:19,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:19,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:19,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:41 [2021-06-05 14:37:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:19,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649852747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:19,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:19,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:19,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267427731] [2021-06-05 14:37:19,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:19,819 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:20,120 INFO L93 Difference]: Finished difference Result 575 states and 1550 transitions. [2021-06-05 14:37:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:20,121 INFO L225 Difference]: With dead ends: 575 [2021-06-05 14:37:20,121 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:37:20,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:37:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 549. [2021-06-05 14:37:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-06-05 14:37:20,130 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-06-05 14:37:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:20,130 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-06-05 14:37:20,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-06-05 14:37:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:20,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:20,130 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:20,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7524,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:20,331 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash -726634519, now seen corresponding path program 363 times [2021-06-05 14:37:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:20,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306466234] [2021-06-05 14:37:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:20,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:20,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306466234] [2021-06-05 14:37:20,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306466234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:20,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255594865] [2021-06-05 14:37:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:20,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:20,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:20,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:20,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:20,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:20,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:20,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:20,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,011 INFO L628 ElimStorePlain]: treesize reduction 176, result has 30.7 percent of original size [2021-06-05 14:37:21,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:21,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:21,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:21,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:21,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:21,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:21,077 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:37:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255594865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:21,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:21,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608957888] [2021-06-05 14:37:21,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:21,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:21,145 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:21,564 INFO L93 Difference]: Finished difference Result 575 states and 1550 transitions. [2021-06-05 14:37:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:21,565 INFO L225 Difference]: With dead ends: 575 [2021-06-05 14:37:21,565 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:37:21,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:37:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 549. [2021-06-05 14:37:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-06-05 14:37:21,569 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-06-05 14:37:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:21,569 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-06-05 14:37:21,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-06-05 14:37:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:21,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:21,570 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:21,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7538 [2021-06-05 14:37:21,770 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1461548657, now seen corresponding path program 364 times [2021-06-05 14:37:21,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:21,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016090347] [2021-06-05 14:37:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016090347] [2021-06-05 14:37:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016090347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675718115] [2021-06-05 14:37:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:22,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:22,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:22,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:22,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:22,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:22,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,470 INFO L628 ElimStorePlain]: treesize reduction 232, result has 23.9 percent of original size [2021-06-05 14:37:22,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:22,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:22,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:22,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:22,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:22,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:22,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:22,529 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:22,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675718115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:22,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:22,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:22,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136628096] [2021-06-05 14:37:22,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:22,598 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:22,908 INFO L93 Difference]: Finished difference Result 573 states and 1547 transitions. [2021-06-05 14:37:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:22,909 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:37:22,909 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:37:22,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:37:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 549. [2021-06-05 14:37:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.7554744525547443) internal successors, (1510), 548 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1510 transitions. [2021-06-05 14:37:22,913 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1510 transitions. Word has length 18 [2021-06-05 14:37:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:22,913 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1510 transitions. [2021-06-05 14:37:22,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1510 transitions. [2021-06-05 14:37:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:22,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:22,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:23,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7563 [2021-06-05 14:37:23,114 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1502592933, now seen corresponding path program 365 times [2021-06-05 14:37:23,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:23,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982310895] [2021-06-05 14:37:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:23,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:23,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982310895] [2021-06-05 14:37:23,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982310895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371280423] [2021-06-05 14:37:23,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:23,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:37:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:23,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:23,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:23,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:23,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:23,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:23,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:23,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:23,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:41 [2021-06-05 14:37:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:23,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371280423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:23,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674148931] [2021-06-05 14:37:23,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:23,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:23,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:23,643 INFO L87 Difference]: Start difference. First operand 549 states and 1510 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:24,156 INFO L93 Difference]: Finished difference Result 666 states and 1722 transitions. [2021-06-05 14:37:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:37:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:24,157 INFO L225 Difference]: With dead ends: 666 [2021-06-05 14:37:24,157 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 14:37:24,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:37:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 14:37:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 555. [2021-06-05 14:37:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.765342960288809) internal successors, (1532), 554 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1532 transitions. [2021-06-05 14:37:24,162 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1532 transitions. Word has length 18 [2021-06-05 14:37:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:24,162 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1532 transitions. [2021-06-05 14:37:24,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1532 transitions. [2021-06-05 14:37:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:24,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:24,163 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:24,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7587 [2021-06-05 14:37:24,363 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1897048937, now seen corresponding path program 366 times [2021-06-05 14:37:24,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:24,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54414144] [2021-06-05 14:37:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54414144] [2021-06-05 14:37:24,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54414144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856988400] [2021-06-05 14:37:24,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:24,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:37:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:24,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:24,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:24,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:24,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:24,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:24,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:24,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:24,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:24,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:24,817 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 14:37:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856988400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:24,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:24,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854709180] [2021-06-05 14:37:24,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:24,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:24,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:24,923 INFO L87 Difference]: Start difference. First operand 555 states and 1532 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:25,413 INFO L93 Difference]: Finished difference Result 672 states and 1739 transitions. [2021-06-05 14:37:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:37:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:25,414 INFO L225 Difference]: With dead ends: 672 [2021-06-05 14:37:25,414 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 14:37:25,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 14:37:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 557. [2021-06-05 14:37:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.7697841726618706) internal successors, (1540), 556 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1540 transitions. [2021-06-05 14:37:25,419 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1540 transitions. Word has length 18 [2021-06-05 14:37:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:25,419 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1540 transitions. [2021-06-05 14:37:25,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1540 transitions. [2021-06-05 14:37:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:25,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:25,420 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:25,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7598,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:25,620 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 160271205, now seen corresponding path program 367 times [2021-06-05 14:37:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:25,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241268025] [2021-06-05 14:37:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:25,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:25,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241268025] [2021-06-05 14:37:25,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241268025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:25,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198136240] [2021-06-05 14:37:25,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:26,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:26,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:26,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,241 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2021-06-05 14:37:26,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:26,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,253 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:37:26,257 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:26,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:26,264 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,268 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:26,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:26,271 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:26,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:26,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:26,300 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:40 [2021-06-05 14:37:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198136240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:26,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:26,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386161810] [2021-06-05 14:37:26,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:26,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:26,403 INFO L87 Difference]: Start difference. First operand 557 states and 1540 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:27,022 INFO L93 Difference]: Finished difference Result 670 states and 1733 transitions. [2021-06-05 14:37:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:37:27,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:27,023 INFO L225 Difference]: With dead ends: 670 [2021-06-05 14:37:27,023 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 14:37:27,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 693.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 14:37:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 556. [2021-06-05 14:37:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.7675675675675677) internal successors, (1536), 555 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1536 transitions. [2021-06-05 14:37:27,028 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1536 transitions. Word has length 18 [2021-06-05 14:37:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:27,028 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1536 transitions. [2021-06-05 14:37:27,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1536 transitions. [2021-06-05 14:37:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:27,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:27,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:27,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7609 [2021-06-05 14:37:27,230 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1860062781, now seen corresponding path program 368 times [2021-06-05 14:37:27,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:27,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451677335] [2021-06-05 14:37:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:27,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:27,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451677335] [2021-06-05 14:37:27,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451677335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915564597] [2021-06-05 14:37:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:27,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:27,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:27,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:27,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,785 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:37:27,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:27,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:27,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:27,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:27,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:27,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:27,850 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915564597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:27,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971433097] [2021-06-05 14:37:27,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:27,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:27,954 INFO L87 Difference]: Start difference. First operand 556 states and 1536 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:28,514 INFO L93 Difference]: Finished difference Result 629 states and 1660 transitions. [2021-06-05 14:37:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:28,515 INFO L225 Difference]: With dead ends: 629 [2021-06-05 14:37:28,515 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 14:37:28,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 14:37:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 556. [2021-06-05 14:37:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-06-05 14:37:28,520 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-06-05 14:37:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-06-05 14:37:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-06-05 14:37:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:28,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:28,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:28,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7687 [2021-06-05 14:37:28,721 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 698126783, now seen corresponding path program 369 times [2021-06-05 14:37:28,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:28,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327258954] [2021-06-05 14:37:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:28,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:28,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327258954] [2021-06-05 14:37:28,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327258954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:28,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530539784] [2021-06-05 14:37:28,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:37:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:29,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:29,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:29,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:29,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:29,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,371 INFO L628 ElimStorePlain]: treesize reduction 259, result has 22.9 percent of original size [2021-06-05 14:37:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:29,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:29,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:29,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:29,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:29,435 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530539784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:29,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:29,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:37:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018077371] [2021-06-05 14:37:29,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:29,531 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,136 INFO L93 Difference]: Finished difference Result 628 states and 1654 transitions. [2021-06-05 14:37:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:37:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,137 INFO L225 Difference]: With dead ends: 628 [2021-06-05 14:37:30,137 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:37:30,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 821.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:37:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 556. [2021-06-05 14:37:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-06-05 14:37:30,142 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-06-05 14:37:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,142 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-06-05 14:37:30,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-06-05 14:37:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:30,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7710,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:30,343 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash -618030521, now seen corresponding path program 370 times [2021-06-05 14:37:30,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510987387] [2021-06-05 14:37:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510987387] [2021-06-05 14:37:30,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510987387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267172563] [2021-06-05 14:37:30,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:30,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:30,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:30,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:30,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:30,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:30,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:30,985 INFO L628 ElimStorePlain]: treesize reduction 261, result has 23.0 percent of original size [2021-06-05 14:37:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:30,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:31,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:31,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:31,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:31,057 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:452, output treesize:41 [2021-06-05 14:37:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267172563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:31,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:31,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:37:31,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595475759] [2021-06-05 14:37:31,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:31,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:31,116 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:31,782 INFO L93 Difference]: Finished difference Result 619 states and 1642 transitions. [2021-06-05 14:37:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:37:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:31,783 INFO L225 Difference]: With dead ends: 619 [2021-06-05 14:37:31,783 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:37:31,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:37:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 556. [2021-06-05 14:37:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.765765765765766) internal successors, (1535), 555 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1535 transitions. [2021-06-05 14:37:31,788 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1535 transitions. Word has length 18 [2021-06-05 14:37:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:31,788 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1535 transitions. [2021-06-05 14:37:31,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1535 transitions. [2021-06-05 14:37:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:31,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:31,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:31,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7734,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:31,989 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1928558249, now seen corresponding path program 371 times [2021-06-05 14:37:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:31,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575081188] [2021-06-05 14:37:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575081188] [2021-06-05 14:37:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575081188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204445357] [2021-06-05 14:37:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:32,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:32,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:32,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:32,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:32,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:32,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:32,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:32,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:32,517 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:123, output treesize:40 [2021-06-05 14:37:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204445357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:32,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:32,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937754811] [2021-06-05 14:37:32,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:32,625 INFO L87 Difference]: Start difference. First operand 556 states and 1535 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,115 INFO L93 Difference]: Finished difference Result 607 states and 1622 transitions. [2021-06-05 14:37:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,116 INFO L225 Difference]: With dead ends: 607 [2021-06-05 14:37:33,116 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:37:33,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 713.7ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:37:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 559. [2021-06-05 14:37:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-06-05 14:37:33,121 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-06-05 14:37:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,121 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-06-05 14:37:33,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-06-05 14:37:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:33,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,123 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7762 [2021-06-05 14:37:33,325 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 191780517, now seen corresponding path program 372 times [2021-06-05 14:37:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303966216] [2021-06-05 14:37:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303966216] [2021-06-05 14:37:33,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303966216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682321612] [2021-06-05 14:37:33,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:33,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:33,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:33,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:33,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:33,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:33,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:33,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:33,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:33,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:33,863 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:40 [2021-06-05 14:37:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682321612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:33,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:33,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433980201] [2021-06-05 14:37:33,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:33,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:33,993 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:34,513 INFO L93 Difference]: Finished difference Result 611 states and 1627 transitions. [2021-06-05 14:37:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:34,515 INFO L225 Difference]: With dead ends: 611 [2021-06-05 14:37:34,515 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 14:37:34,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 738.9ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 14:37:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 559. [2021-06-05 14:37:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-06-05 14:37:34,524 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-06-05 14:37:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:34,525 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-06-05 14:37:34,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-06-05 14:37:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:34,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:34,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:34,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7773 [2021-06-05 14:37:34,733 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1124376787, now seen corresponding path program 373 times [2021-06-05 14:37:34,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:34,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037443416] [2021-06-05 14:37:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:34,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037443416] [2021-06-05 14:37:34,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037443416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459694803] [2021-06-05 14:37:34,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:34,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:35,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:35,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:35,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:35,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,396 INFO L628 ElimStorePlain]: treesize reduction 251, result has 23.2 percent of original size [2021-06-05 14:37:35,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:35,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:35,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:35,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:35,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:35,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:35,457 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459694803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:35,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925120149] [2021-06-05 14:37:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:35,526 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:35,976 INFO L93 Difference]: Finished difference Result 598 states and 1607 transitions. [2021-06-05 14:37:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:35,977 INFO L225 Difference]: With dead ends: 598 [2021-06-05 14:37:35,977 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:37:35,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:37:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 559. [2021-06-05 14:37:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-06-05 14:37:35,982 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-06-05 14:37:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:35,982 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-06-05 14:37:35,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-06-05 14:37:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:35,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:35,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:36,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7785 [2021-06-05 14:37:36,183 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1024419749, now seen corresponding path program 374 times [2021-06-05 14:37:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:36,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880742637] [2021-06-05 14:37:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:36,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:36,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880742637] [2021-06-05 14:37:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880742637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959264649] [2021-06-05 14:37:36,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:36,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:36,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:36,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:36,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:36,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:36,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,858 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-06-05 14:37:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:36,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:36,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:36,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:36,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:36,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:36,919 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:36,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959264649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:36,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:36,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642129800] [2021-06-05 14:37:36,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:36,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:36,989 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:37,403 INFO L93 Difference]: Finished difference Result 594 states and 1601 transitions. [2021-06-05 14:37:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:37,404 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:37:37,404 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 14:37:37,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 14:37:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 559. [2021-06-05 14:37:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.7688172043010755) internal successors, (1545), 558 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1545 transitions. [2021-06-05 14:37:37,409 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1545 transitions. Word has length 18 [2021-06-05 14:37:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:37,409 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1545 transitions. [2021-06-05 14:37:37,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1545 transitions. [2021-06-05 14:37:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:37,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:37,410 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:37,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7809 [2021-06-05 14:37:37,610 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -883274109, now seen corresponding path program 375 times [2021-06-05 14:37:37,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:37,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000950919] [2021-06-05 14:37:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000950919] [2021-06-05 14:37:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000950919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689986056] [2021-06-05 14:37:37,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:37:37,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:38,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2021-06-05 14:37:38,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2021-06-05 14:37:38,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:38,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 14:37:38,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,408 INFO L628 ElimStorePlain]: treesize reduction 263, result has 23.5 percent of original size [2021-06-05 14:37:38,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 14:37:38,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:38,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:38,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:38,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:38,471 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:494, output treesize:40 [2021-06-05 14:37:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:38,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689986056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:38,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:38,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106387393] [2021-06-05 14:37:38,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:38,579 INFO L87 Difference]: Start difference. First operand 559 states and 1545 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:39,196 INFO L93 Difference]: Finished difference Result 636 states and 1702 transitions. [2021-06-05 14:37:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:39,197 INFO L225 Difference]: With dead ends: 636 [2021-06-05 14:37:39,197 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 14:37:39,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 14:37:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 565. [2021-06-05 14:37:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.773049645390071) internal successors, (1564), 564 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1564 transitions. [2021-06-05 14:37:39,202 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1564 transitions. Word has length 18 [2021-06-05 14:37:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:39,202 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 1564 transitions. [2021-06-05 14:37:39,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1564 transitions. [2021-06-05 14:37:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:39,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:39,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:39,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7832,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,403 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1674915455, now seen corresponding path program 376 times [2021-06-05 14:37:39,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:39,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297142445] [2021-06-05 14:37:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297142445] [2021-06-05 14:37:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297142445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344465169] [2021-06-05 14:37:39,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:39,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:39,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:39,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:39,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:39,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:39,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:39,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:40,055 INFO L628 ElimStorePlain]: treesize reduction 228, result has 24.0 percent of original size [2021-06-05 14:37:40,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:40,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:40,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:40,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:40,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:40,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:40,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:40,117 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:439, output treesize:40 [2021-06-05 14:37:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344465169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:40,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:40,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682772449] [2021-06-05 14:37:40,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:40,222 INFO L87 Difference]: Start difference. First operand 565 states and 1564 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:40,577 INFO L93 Difference]: Finished difference Result 614 states and 1647 transitions. [2021-06-05 14:37:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:40,578 INFO L225 Difference]: With dead ends: 614 [2021-06-05 14:37:40,578 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:37:40,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 518.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:37:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 569. [2021-06-05 14:37:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-06-05 14:37:40,583 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-06-05 14:37:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:40,584 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-06-05 14:37:40,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-06-05 14:37:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:40,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:40,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:40,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7857,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:40,785 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash 358758151, now seen corresponding path program 377 times [2021-06-05 14:37:40,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:40,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792140199] [2021-06-05 14:37:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:40,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792140199] [2021-06-05 14:37:40,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792140199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42836914] [2021-06-05 14:37:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:41,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:41,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:41,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:41,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:41,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:37:41,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:41,332 INFO L628 ElimStorePlain]: treesize reduction 17, result has 70.7 percent of original size [2021-06-05 14:37:41,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:41,332 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:126, output treesize:41 [2021-06-05 14:37:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42836914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:41,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:37:41,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492312779] [2021-06-05 14:37:41,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:37:41,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:41,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:37:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:41,414 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:41,781 INFO L93 Difference]: Finished difference Result 602 states and 1630 transitions. [2021-06-05 14:37:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:41,782 INFO L225 Difference]: With dead ends: 602 [2021-06-05 14:37:41,782 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 14:37:41,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 14:37:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 569. [2021-06-05 14:37:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-06-05 14:37:41,787 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-06-05 14:37:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:41,787 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-06-05 14:37:41,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-06-05 14:37:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:41,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:41,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:41,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7884,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,988 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1787412609, now seen corresponding path program 378 times [2021-06-05 14:37:41,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:41,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324036975] [2021-06-05 14:37:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:42,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324036975] [2021-06-05 14:37:42,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324036975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391272304] [2021-06-05 14:37:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:42,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:42,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:42,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:42,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:42,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:42,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:42,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:42,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:42,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:69, output treesize:41 [2021-06-05 14:37:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391272304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:42,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:37:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538911211] [2021-06-05 14:37:42,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:42,518 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:42,783 INFO L93 Difference]: Finished difference Result 602 states and 1630 transitions. [2021-06-05 14:37:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:42,784 INFO L225 Difference]: With dead ends: 602 [2021-06-05 14:37:42,784 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 14:37:42,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 14:37:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 569. [2021-06-05 14:37:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-06-05 14:37:42,788 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-06-05 14:37:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:42,789 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-06-05 14:37:42,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-06-05 14:37:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:42,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:42,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7894 [2021-06-05 14:37:42,990 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 400770567, now seen corresponding path program 379 times [2021-06-05 14:37:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861354042] [2021-06-05 14:37:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861354042] [2021-06-05 14:37:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861354042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986465566] [2021-06-05 14:37:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:43,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:43,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:43,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:43,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:43,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:43,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,937 INFO L628 ElimStorePlain]: treesize reduction 234, result has 23.3 percent of original size [2021-06-05 14:37:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:43,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:43,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:43,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:43,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:43,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986465566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:37:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085299164] [2021-06-05 14:37:44,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:37:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:37:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:44,066 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:44,419 INFO L93 Difference]: Finished difference Result 600 states and 1627 transitions. [2021-06-05 14:37:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:44,420 INFO L225 Difference]: With dead ends: 600 [2021-06-05 14:37:44,420 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 14:37:44,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:37:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 14:37:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 569. [2021-06-05 14:37:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.7764084507042255) internal successors, (1577), 568 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1577 transitions. [2021-06-05 14:37:44,425 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1577 transitions. Word has length 18 [2021-06-05 14:37:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:44,425 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1577 transitions. [2021-06-05 14:37:44,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1577 transitions. [2021-06-05 14:37:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:44,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:44,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:44,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7909 [2021-06-05 14:37:44,626 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:44,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1299264557, now seen corresponding path program 380 times [2021-06-05 14:37:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:44,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61117427] [2021-06-05 14:37:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:44,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61117427] [2021-06-05 14:37:44,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61117427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341236107] [2021-06-05 14:37:44,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:45,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:45,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:45,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:45,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:45,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,439 INFO L628 ElimStorePlain]: treesize reduction 238, result has 23.2 percent of original size [2021-06-05 14:37:45,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:45,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:45,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:45,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:45,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:45,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:45,508 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341236107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:45,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:45,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586800308] [2021-06-05 14:37:45,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:45,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:45,616 INFO L87 Difference]: Start difference. First operand 569 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:46,113 INFO L93 Difference]: Finished difference Result 698 states and 1848 transitions. [2021-06-05 14:37:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:46,114 INFO L225 Difference]: With dead ends: 698 [2021-06-05 14:37:46,114 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 14:37:46,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 14:37:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 574. [2021-06-05 14:37:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.7801047120418847) internal successors, (1593), 573 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1593 transitions. [2021-06-05 14:37:46,119 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1593 transitions. Word has length 18 [2021-06-05 14:37:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:46,119 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1593 transitions. [2021-06-05 14:37:46,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1593 transitions. [2021-06-05 14:37:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:46,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:46,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:46,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7932,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:46,320 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -437513175, now seen corresponding path program 381 times [2021-06-05 14:37:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381723280] [2021-06-05 14:37:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381723280] [2021-06-05 14:37:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381723280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653831409] [2021-06-05 14:37:46,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:46,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:46,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:46,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:47,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:47,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:47,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:47,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:47,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,151 INFO L628 ElimStorePlain]: treesize reduction 245, result has 23.4 percent of original size [2021-06-05 14:37:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:47,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:47,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:47,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:47,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:47,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:47,215 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:454, output treesize:40 [2021-06-05 14:37:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653831409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:47,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523687333] [2021-06-05 14:37:47,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:47,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:47,322 INFO L87 Difference]: Start difference. First operand 574 states and 1593 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,822 INFO L93 Difference]: Finished difference Result 700 states and 1850 transitions. [2021-06-05 14:37:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,823 INFO L225 Difference]: With dead ends: 700 [2021-06-05 14:37:47,823 INFO L226 Difference]: Without dead ends: 693 [2021-06-05 14:37:47,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-05 14:37:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 573. [2021-06-05 14:37:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.777972027972028) internal successors, (1589), 572 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1589 transitions. [2021-06-05 14:37:47,828 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1589 transitions. Word has length 18 [2021-06-05 14:37:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,829 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1589 transitions. [2021-06-05 14:37:47,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1589 transitions. [2021-06-05 14:37:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:47,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,829 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:48,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7955,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,030 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1753670479, now seen corresponding path program 382 times [2021-06-05 14:37:48,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:48,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109120625] [2021-06-05 14:37:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109120625] [2021-06-05 14:37:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109120625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660104602] [2021-06-05 14:37:48,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:48,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:48,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:48,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,836 INFO L628 ElimStorePlain]: treesize reduction 152, result has 32.4 percent of original size [2021-06-05 14:37:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:48,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:48,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:48,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:48,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:48,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:48,896 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:331, output treesize:41 [2021-06-05 14:37:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660104602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:48,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:48,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993012637] [2021-06-05 14:37:48,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:48,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:48,968 INFO L87 Difference]: Start difference. First operand 573 states and 1589 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:49,451 INFO L93 Difference]: Finished difference Result 687 states and 1829 transitions. [2021-06-05 14:37:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:49,453 INFO L225 Difference]: With dead ends: 687 [2021-06-05 14:37:49,453 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 14:37:49,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 14:37:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 572. [2021-06-05 14:37:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-06-05 14:37:49,458 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-06-05 14:37:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:49,458 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-06-05 14:37:49,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-06-05 14:37:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:49,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:49,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7978,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,660 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 395126057, now seen corresponding path program 383 times [2021-06-05 14:37:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419615224] [2021-06-05 14:37:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419615224] [2021-06-05 14:37:49,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419615224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995348683] [2021-06-05 14:37:49,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:50,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:37:50,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:37:50,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:50,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:50,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,420 INFO L628 ElimStorePlain]: treesize reduction 234, result has 23.3 percent of original size [2021-06-05 14:37:50,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:50,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:50,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:50,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:50,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:50,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995348683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:50,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:50,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130242477] [2021-06-05 14:37:50,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:50,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:50,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:50,563 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,178 INFO L93 Difference]: Finished difference Result 686 states and 1826 transitions. [2021-06-05 14:37:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,179 INFO L225 Difference]: With dead ends: 686 [2021-06-05 14:37:51,179 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 14:37:51,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 14:37:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 572. [2021-06-05 14:37:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-06-05 14:37:51,184 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-06-05 14:37:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,184 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-06-05 14:37:51,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-06-05 14:37:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:51,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8003 [2021-06-05 14:37:51,385 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1711658063, now seen corresponding path program 384 times [2021-06-05 14:37:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323371039] [2021-06-05 14:37:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323371039] [2021-06-05 14:37:51,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323371039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120037743] [2021-06-05 14:37:51,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:51,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:52,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:37:52,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:52,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-06-05 14:37:52,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-06-05 14:37:52,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,147 INFO L628 ElimStorePlain]: treesize reduction 249, result has 23.9 percent of original size [2021-06-05 14:37:52,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:37:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:52,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:52,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:52,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:52,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:52,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:52,206 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:458, output treesize:41 [2021-06-05 14:37:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120037743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:52,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:37:52,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044437944] [2021-06-05 14:37:52,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:37:52,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:37:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:37:52,277 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:52,944 INFO L93 Difference]: Finished difference Result 686 states and 1826 transitions. [2021-06-05 14:37:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:52,945 INFO L225 Difference]: With dead ends: 686 [2021-06-05 14:37:52,945 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 14:37:52,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 907.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 14:37:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 572. [2021-06-05 14:37:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.777583187390543) internal successors, (1586), 571 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1586 transitions. [2021-06-05 14:37:52,951 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1586 transitions. Word has length 18 [2021-06-05 14:37:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:52,951 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1586 transitions. [2021-06-05 14:37:52,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1586 transitions. [2021-06-05 14:37:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:37:52,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:52,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:53,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8029,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,152 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1254611813, now seen corresponding path program 385 times [2021-06-05 14:37:53,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:53,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836879190] [2021-06-05 14:37:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:53,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836879190] [2021-06-05 14:37:53,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836879190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637355122] [2021-06-05 14:37:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:53,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:37:53,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:53,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:53,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:53,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:37:53,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:37:53,570 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:37:53,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:53,579 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:53,616 INFO L628 ElimStorePlain]: treesize reduction 34, result has 54.7 percent of original size [2021-06-05 14:37:53,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:53,617 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:248, output treesize:41 [2021-06-05 14:37:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:53,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637355122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:53,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:37:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611250172] [2021-06-05 14:37:53,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:53,690 INFO L87 Difference]: Start difference. First operand 572 states and 1586 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:54,253 INFO L93 Difference]: Finished difference Result 684 states and 1823 transitions. [2021-06-05 14:37:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:37:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:54,254 INFO L225 Difference]: With dead ends: 684 [2021-06-05 14:37:54,254 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 14:37:54,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 14:37:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 574. [2021-06-05 14:37:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.7731239092495636) internal successors, (1589), 573 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1589 transitions. [2021-06-05 14:37:54,259 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1589 transitions. Word has length 18 [2021-06-05 14:37:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:54,259 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1589 transitions. [2021-06-05 14:37:54,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1589 transitions. [2021-06-05 14:37:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:37:54,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:54,260 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:54,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8055 [2021-06-05 14:37:54,460 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -100662137, now seen corresponding path program 386 times [2021-06-05 14:37:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:54,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183646629] [2021-06-05 14:37:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:37:54,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183646629] [2021-06-05 14:37:54,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183646629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695258141] [2021-06-05 14:37:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:54,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:54,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:37:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:37:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695258141] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:54,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:37:54,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-06-05 14:37:54,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714444269] [2021-06-05 14:37:54,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:37:54,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:37:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:54,584 INFO L87 Difference]: Start difference. First operand 574 states and 1589 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:54,590 INFO L93 Difference]: Finished difference Result 462 states and 1003 transitions. [2021-06-05 14:37:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:37:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:37:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:54,591 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:37:54,591 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:37:54,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:37:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 298. [2021-06-05 14:37:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.1077441077441077) internal successors, (626), 297 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 626 transitions. [2021-06-05 14:37:54,593 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 626 transitions. Word has length 19 [2021-06-05 14:37:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:54,594 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 626 transitions. [2021-06-05 14:37:54,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 626 transitions. [2021-06-05 14:37:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:37:54,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:54,594 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:54,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8066 [2021-06-05 14:37:54,794 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -199901446, now seen corresponding path program 387 times [2021-06-05 14:37:54,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:54,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536917091] [2021-06-05 14:37:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:54,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536917091] [2021-06-05 14:37:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536917091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409971123] [2021-06-05 14:37:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:54,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:54,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:37:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:37:54,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409971123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:54,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:37:54,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2021-06-05 14:37:54,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436540327] [2021-06-05 14:37:54,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:37:54,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:37:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:54,923 INFO L87 Difference]: Start difference. First operand 298 states and 626 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:54,928 INFO L93 Difference]: Finished difference Result 175 states and 252 transitions. [2021-06-05 14:37:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:37:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:37:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:54,928 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:37:54,928 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 14:37:54,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 14:37:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 14:37:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 14:37:54,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-06-05 14:37:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:54,929 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 14:37:54,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 14:37:54,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 14:37:55,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8067 [2021-06-05 14:37:55,130 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:37:55,132 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:37:55 BasicIcfg [2021-06-05 14:37:55,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:37:55,133 INFO L168 Benchmark]: Toolchain (without parser) took 460150.08 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 332.3 MB in the beginning and 163.5 MB in the end (delta: 168.8 MB). Peak memory consumption was 241.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 330.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L168 Benchmark]: Boogie Preprocessor took 18.42 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L168 Benchmark]: RCFGBuilder took 519.28 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 331.7 MB in the end (delta: -2.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L168 Benchmark]: TraceAbstraction took 459582.51 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 331.7 MB in the beginning and 163.5 MB in the end (delta: 168.2 MB). Peak memory consumption was 239.5 MB. Max. memory is 16.0 GB. [2021-06-05 14:37:55,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 352.3 MB. Free memory was 332.3 MB in the beginning and 330.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.42 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 519.28 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 331.7 MB in the end (delta: -2.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 459582.51 ms. Allocated memory was 352.3 MB in the beginning and 423.6 MB in the end (delta: 71.3 MB). Free memory was 331.7 MB in the beginning and 163.5 MB in the end (delta: 168.2 MB). Peak memory consumption was 239.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 459472.6ms, OverallIterations: 399, TraceHistogramMax: 4, EmptinessCheckTime: 139.7ms, AutomataDifference: 164959.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11846 SDtfs, 17090 SDslu, 83158 SDs, 0 SdLazy, 113243 SolverSat, 4445 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47718.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12277 GetRequests, 4602 SyntacticMatches, 495 SemanticMatches, 7180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28511 ImplicationChecksByTransitivity, 215981.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=574occurred in iteration=392, InterpolantAutomatonStates: 5215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1045.4ms AutomataMinimizationTime, 399 MinimizatonAttempts, 16017 StatesRemovedByMinimization, 395 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1927.2ms SsaConstructionTime, 5789.2ms SatisfiabilityAnalysisTime, 187727.0ms InterpolantComputationTime, 13521 NumberOfCodeBlocks, 13521 NumberOfCodeBlocksAsserted, 1287 NumberOfCheckSat, 12733 ConstructedInterpolants, 294 QuantifiedInterpolants, 196732 SizeOfPredicates, 3132 NumberOfNonLiveVariables, 34294 ConjunctsInSsa, 10707 ConjunctsInUnsatCore, 788 InterpolantComputations, 14 PerfectInterpolantSequences, 773/7623 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...