/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:19:01,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:19:01,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:19:01,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:19:01,157 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.epf [2021-07-13 20:19:01,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:19:01,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:19:01,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:19:01,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:19:01,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:19:01,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:19:01,215 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:19:01,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:19:01,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:19:01,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:19:01,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:19:01,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:19:01,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:19:01,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:19:01,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:19:01,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:19:01,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:19:01,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:19:01,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:19:01,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:19:01,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:19:01,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:19:01,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:19:01,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:19:01,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:19:01,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:19:01,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:19:01,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:19:01,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:19:01,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:19:01,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:19:01,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:19:01,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:19:01,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:19:01,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:19:01,872 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:19:01,873 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:19:01,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-07-13 20:19:01,874 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-07-13 20:19:01,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:19:01,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:19:01,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:19:01,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:19:01,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:19:01,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:01,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:01,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:19:01,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:19:01,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:19:01,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:19:01,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:01,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/1) ... [2021-07-13 20:19:02,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:19:02,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:19:02,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:19:02,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:19:02,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (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 [2021-07-13 20:19:02,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:19:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:19:02,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:19:02,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:19:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:19:02,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:19:02,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:19:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:19:02,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:19:02,199 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:19:02,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:19:02,512 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:19:02,514 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:19:02 BoogieIcfgContainer [2021-07-13 20:19:02,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:19:02,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:19:02,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:19:02,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:19:02,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:19:01" (1/2) ... [2021-07-13 20:19:02,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c52322 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:19:02, skipping insertion in model container [2021-07-13 20:19:02,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:19:02" (2/2) ... [2021-07-13 20:19:02,520 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-07-13 20:19:02,546 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:19:02,546 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:19:02,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:19:02,548 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:19:02,624 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:19:02,660 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:19:02,677 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:19:02,677 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:19:02,677 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:19:02,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:19:02,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:19:02,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:19:02,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:19:02,678 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:19:02,686 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-07-13 20:19:02,702 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2021-07-13 20:19:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) [2021-07-13 20:19:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:19:02,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:02,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:02,712 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-07-13 20:19:02,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:02,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857066762] [2021-07-13 20:19:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:02,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857066762] [2021-07-13 20:19:02,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857066762] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:02,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:02,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:19:02,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007238885] [2021-07-13 20:19:02,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:19:02,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:02,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:19:02,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:19:02,879 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:02,899 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-07-13 20:19:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:19:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:19:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:02,908 INFO L225 Difference]: With dead ends: 57 [2021-07-13 20:19:02,908 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 20:19:02,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:19:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 20:19:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-07-13 20:19:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 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) [2021-07-13 20:19:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-07-13 20:19:02,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-07-13 20:19:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:02,953 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-07-13 20:19:02,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-07-13 20:19:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:19:02,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:02,955 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:02,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:19:02,955 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-07-13 20:19:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:02,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909880074] [2021-07-13 20:19:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909880074] [2021-07-13 20:19:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909880074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935838708] [2021-07-13 20:19:03,062 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 [2021-07-13 20:19:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:19:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935838708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:03,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-13 20:19:03,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492956956] [2021-07-13 20:19:03,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:19:03,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:19:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:19:03,278 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-07-13 20:19:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,445 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-07-13 20:19:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:19:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 [2021-07-13 20:19:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,450 INFO L225 Difference]: With dead ends: 68 [2021-07-13 20:19:03,450 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 20:19:03,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 20:19:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-07-13 20:19:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-07-13 20:19:03,467 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-07-13 20:19:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:03,467 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-07-13 20:19:03,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-07-13 20:19:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-07-13 20:19:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:19:03,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:03,468 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:03,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:19:03,669 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-07-13 20:19:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:03,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95012968] [2021-07-13 20:19:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95012968] [2021-07-13 20:19:03,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95012968] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:03,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:03,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:19:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697648654] [2021-07-13 20:19:03,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:19:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:19:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:19:03,762 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,838 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-07-13 20:19:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:19:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:19:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,842 INFO L225 Difference]: With dead ends: 71 [2021-07-13 20:19:03,847 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 20:19:03,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 20:19:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-07-13 20:19:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-07-13 20:19:03,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-07-13 20:19:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:03,853 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-07-13 20:19:03,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-07-13 20:19:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:19:03,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:03,854 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:03,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:19:03,854 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-07-13 20:19:03,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:03,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427442628] [2021-07-13 20:19:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:03,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427442628] [2021-07-13 20:19:03,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427442628] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:03,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:03,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:19:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464116005] [2021-07-13 20:19:03,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:19:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:19:03,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:19:03,934 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,984 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-07-13 20:19:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:19:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:19:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,987 INFO L225 Difference]: With dead ends: 51 [2021-07-13 20:19:03,987 INFO L226 Difference]: Without dead ends: 51 [2021-07-13 20:19:03,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-13 20:19:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-07-13 20:19:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-07-13 20:19:04,004 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-07-13 20:19:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,004 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-07-13 20:19:04,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-07-13 20:19:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:19:04,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,006 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:19:04,006 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-07-13 20:19:04,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292727333] [2021-07-13 20:19:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292727333] [2021-07-13 20:19:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292727333] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:19:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:19:04,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:19:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501733411] [2021-07-13 20:19:04,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:19:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:19:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:19:04,069 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,138 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-07-13 20:19:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:19:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:19:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,139 INFO L225 Difference]: With dead ends: 51 [2021-07-13 20:19:04,139 INFO L226 Difference]: Without dead ends: 49 [2021-07-13 20:19:04,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:19:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-13 20:19:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-07-13 20:19:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-07-13 20:19:04,142 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-07-13 20:19:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,143 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-07-13 20:19:04,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-07-13 20:19:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:19:04,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,144 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:19:04,144 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-07-13 20:19:04,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459285124] [2021-07-13 20:19:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459285124] [2021-07-13 20:19:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459285124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531872258] [2021-07-13 20:19:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:19:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:04,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:04,555 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 19 treesize of output 7 [2021-07-13 20:19:04,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:04,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-07-13 20:19:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531872258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:19:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86343114] [2021-07-13 20:19:04,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:19:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:19:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:04,611 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-07-13 20:19:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,684 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-07-13 20:19:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:19:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 [2021-07-13 20:19:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,686 INFO L225 Difference]: With dead ends: 86 [2021-07-13 20:19:04,686 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 20:19:04,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 20:19:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-07-13 20:19:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-07-13 20:19:04,704 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-07-13 20:19:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,704 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-07-13 20:19:04,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-07-13 20:19:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-07-13 20:19:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:19:04,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,706 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:04,907 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-07-13 20:19:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630447799] [2021-07-13 20:19:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:05,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630447799] [2021-07-13 20:19:05,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630447799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060389863] [2021-07-13 20:19:05,022 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 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 [2021-07-13 20:19:05,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:05,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 7 [2021-07-13 20:19:05,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:05,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:05,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:05,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-07-13 20:19:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060389863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:05,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:19:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312117324] [2021-07-13 20:19:05,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:19:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:19:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:05,154 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-07-13 20:19:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,199 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-07-13 20:19:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:19:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 [2021-07-13 20:19:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,201 INFO L225 Difference]: With dead ends: 94 [2021-07-13 20:19:05,201 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 20:19:05,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:19:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 20:19:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-07-13 20:19:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-07-13 20:19:05,205 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-07-13 20:19:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:05,205 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-07-13 20:19:05,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-07-13 20:19:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-07-13 20:19:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:05,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:05,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:05,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:05,428 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-07-13 20:19:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:05,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355230480] [2021-07-13 20:19:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355230480] [2021-07-13 20:19:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355230480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204544002] [2021-07-13 20:19:05,507 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 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 [2021-07-13 20:19:05,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:05,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:05,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204544002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:05,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-13 20:19:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338847580] [2021-07-13 20:19:05,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:05,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:05,676 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-07-13 20:19:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,986 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-07-13 20:19:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 20 [2021-07-13 20:19:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,987 INFO L225 Difference]: With dead ends: 176 [2021-07-13 20:19:05,988 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 20:19:05,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 20:19:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-07-13 20:19:05,992 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) [2021-07-13 20:19:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-07-13 20:19:05,992 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-07-13 20:19:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:05,993 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-07-13 20:19:05,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-07-13 20:19:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-07-13 20:19:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:05,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:05,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:06,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:06,217 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-07-13 20:19:06,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:06,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664176168] [2021-07-13 20:19:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:06,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664176168] [2021-07-13 20:19:06,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664176168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839442662] [2021-07-13 20:19:06,267 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 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 [2021-07-13 20:19:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839442662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:06,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:06,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421039004] [2021-07-13 20:19:06,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:06,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:06,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:06,391 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-13 20:19:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:06,709 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-07-13 20:19:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:19:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 20 [2021-07-13 20:19:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:06,710 INFO L225 Difference]: With dead ends: 219 [2021-07-13 20:19:06,711 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 20:19:06,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 20:19:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-07-13 20:19:06,716 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) [2021-07-13 20:19:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-07-13 20:19:06,717 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-07-13 20:19:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:06,717 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-07-13 20:19:06,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-13 20:19:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-07-13 20:19:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:06,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:06,718 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:06,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:06,933 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-07-13 20:19:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:06,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912656689] [2021-07-13 20:19:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912656689] [2021-07-13 20:19:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912656689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661942593] [2021-07-13 20:19:06,983 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 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 [2021-07-13 20:19:07,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:07,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:07,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661942593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:07,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:19:07,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592405421] [2021-07-13 20:19:07,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:07,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:07,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:07,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:07,117 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:07,402 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-07-13 20:19:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:19:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-07-13 20:19:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:07,404 INFO L225 Difference]: With dead ends: 208 [2021-07-13 20:19:07,404 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 20:19:07,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 20:19:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-07-13 20:19:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-07-13 20:19:07,410 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-07-13 20:19:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:07,410 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-07-13 20:19:07,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-07-13 20:19:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:07,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:07,411 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:07,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:07,633 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-07-13 20:19:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:07,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588200652] [2021-07-13 20:19:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588200652] [2021-07-13 20:19:07,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588200652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822455951] [2021-07-13 20:19:07,672 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 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 [2021-07-13 20:19:07,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822455951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:07,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:19:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944526909] [2021-07-13 20:19:07,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:07,796 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:08,071 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-07-13 20:19:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:19:08,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-07-13 20:19:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:08,074 INFO L225 Difference]: With dead ends: 205 [2021-07-13 20:19:08,074 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 20:19:08,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 20:19:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-07-13 20:19:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-07-13 20:19:08,082 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-07-13 20:19:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,082 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-07-13 20:19:08,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-07-13 20:19:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:08,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,289 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-07-13 20:19:08,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980703603] [2021-07-13 20:19:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:08,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980703603] [2021-07-13 20:19:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980703603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112273971] [2021-07-13 20:19:08,357 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 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 [2021-07-13 20:19:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112273971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:08,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:08,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546694888] [2021-07-13 20:19:08,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:08,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:08,496 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 20:19:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:08,848 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-07-13 20:19:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:19:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2021-07-13 20:19:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:08,853 INFO L225 Difference]: With dead ends: 300 [2021-07-13 20:19:08,853 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 20:19:08,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:19:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 20:19:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-07-13 20:19:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-07-13 20:19:08,862 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-07-13 20:19:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,862 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-07-13 20:19:08,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 20:19:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-07-13 20:19:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:08,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,864 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:09,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:19:09,093 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-07-13 20:19:09,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:09,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215830004] [2021-07-13 20:19:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:09,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215830004] [2021-07-13 20:19:09,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215830004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112528164] [2021-07-13 20:19:09,137 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 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 [2021-07-13 20:19:09,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:09,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:09,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112528164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:19:09,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559016834] [2021-07-13 20:19:09,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:09,284 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:19:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:09,550 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-07-13 20:19:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:19:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 20 [2021-07-13 20:19:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:09,552 INFO L225 Difference]: With dead ends: 238 [2021-07-13 20:19:09,552 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 20:19:09,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 20:19:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-07-13 20:19:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-07-13 20:19:09,560 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-07-13 20:19:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:09,561 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-07-13 20:19:09,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:19:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-07-13 20:19:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:09,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:09,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:09,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:09,777 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-07-13 20:19:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:09,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349546994] [2021-07-13 20:19:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:09,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349546994] [2021-07-13 20:19:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349546994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282801096] [2021-07-13 20:19:09,822 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 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 [2021-07-13 20:19:09,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:19:09,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:09,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:09,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282801096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:19:09,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905187376] [2021-07-13 20:19:09,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:09,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:09,949 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:10,243 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-07-13 20:19:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-07-13 20:19:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:10,246 INFO L225 Difference]: With dead ends: 302 [2021-07-13 20:19:10,246 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 20:19:10,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 20:19:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-07-13 20:19:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-07-13 20:19:10,254 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-07-13 20:19:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:10,254 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-07-13 20:19:10,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-13 20:19:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-07-13 20:19:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:19:10,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:10,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:10,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:10,477 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-07-13 20:19:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133595218] [2021-07-13 20:19:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:10,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133595218] [2021-07-13 20:19:10,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133595218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612732870] [2021-07-13 20:19:10,535 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 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 [2021-07-13 20:19:10,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:10,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:19:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612732870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:10,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618635950] [2021-07-13 20:19:10,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:10,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:10,652 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-07-13 20:19:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:10,916 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-07-13 20:19:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:19:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 20 [2021-07-13 20:19:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:10,918 INFO L225 Difference]: With dead ends: 302 [2021-07-13 20:19:10,918 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 20:19:10,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:19:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 20:19:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-07-13 20:19:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-07-13 20:19:10,925 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-07-13 20:19:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:10,925 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-07-13 20:19:10,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-07-13 20:19:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-07-13 20:19:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:10,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:10,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:11,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:19:11,141 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-07-13 20:19:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:11,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180193651] [2021-07-13 20:19:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180193651] [2021-07-13 20:19:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180193651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876347556] [2021-07-13 20:19:11,294 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 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 [2021-07-13 20:19:11,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:19:11,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:11,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:11,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:11,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-07-13 20:19:11,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:11,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:11,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:11,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-13 20:19:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876347556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967451078] [2021-07-13 20:19:11,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:11,533 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:11,647 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-07-13 20:19:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:19:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:11,649 INFO L225 Difference]: With dead ends: 282 [2021-07-13 20:19:11,649 INFO L226 Difference]: Without dead ends: 257 [2021-07-13 20:19:11,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-13 20:19:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-07-13 20:19:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-07-13 20:19:11,656 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-07-13 20:19:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:11,656 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-07-13 20:19:11,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-07-13 20:19:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:11,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:11,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:11,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:19:11,881 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-07-13 20:19:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643035657] [2021-07-13 20:19:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:11,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643035657] [2021-07-13 20:19:11,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643035657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655005886] [2021-07-13 20:19:11,992 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 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 [2021-07-13 20:19:12,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:12,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:12,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:12,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-07-13 20:19:12,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:12,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-13 20:19:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655005886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345217674] [2021-07-13 20:19:12,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:12,179 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:19:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:12,296 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-07-13 20:19:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:12,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 22 [2021-07-13 20:19:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:12,298 INFO L225 Difference]: With dead ends: 256 [2021-07-13 20:19:12,298 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 20:19:12,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 20:19:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-07-13 20:19:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-07-13 20:19:12,304 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-07-13 20:19:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,305 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-07-13 20:19:12,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:19:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-07-13 20:19:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:12,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,305 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:12,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:19:12,525 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-07-13 20:19:12,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:12,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688973374] [2021-07-13 20:19:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:12,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688973374] [2021-07-13 20:19:12,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688973374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342023323] [2021-07-13 20:19:12,654 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:19:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:12,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:12,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:12,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-07-13 20:19:12,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:12,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-13 20:19:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342023323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:12,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294860571] [2021-07-13 20:19:12,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:12,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:12,866 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,037 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-07-13 20:19:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:19:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,038 INFO L225 Difference]: With dead ends: 301 [2021-07-13 20:19:13,038 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 20:19:13,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 20:19:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-07-13 20:19:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-07-13 20:19:13,046 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-07-13 20:19:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,046 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-07-13 20:19:13,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-07-13 20:19:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:13,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,047 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:13,261 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-07-13 20:19:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331090497] [2021-07-13 20:19:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331090497] [2021-07-13 20:19:13,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331090497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79686627] [2021-07-13 20:19:13,364 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 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 [2021-07-13 20:19:13,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:13,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:13,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-07-13 20:19:13,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:13,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:13,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:13,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-13 20:19:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79686627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:13,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:19:13,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096444506] [2021-07-13 20:19:13,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:13,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:13,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:13,530 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:19:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,653 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-07-13 20:19:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 22 [2021-07-13 20:19:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,655 INFO L225 Difference]: With dead ends: 320 [2021-07-13 20:19:13,655 INFO L226 Difference]: Without dead ends: 313 [2021-07-13 20:19:13,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-13 20:19:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-07-13 20:19:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-07-13 20:19:13,662 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-07-13 20:19:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,662 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-07-13 20:19:13,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:19:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-07-13 20:19:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:13,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:13,887 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-07-13 20:19:13,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497527222] [2021-07-13 20:19:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497527222] [2021-07-13 20:19:13,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497527222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887360658] [2021-07-13 20:19:13,955 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 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 [2021-07-13 20:19:13,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:13,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887360658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:19:14,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141565576] [2021-07-13 20:19:14,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:14,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:14,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:14,113 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:14,635 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-07-13 20:19:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:19:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:14,637 INFO L225 Difference]: With dead ends: 495 [2021-07-13 20:19:14,637 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 20:19:14,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 20:19:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-07-13 20:19:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-07-13 20:19:14,645 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-07-13 20:19:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:14,645 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-07-13 20:19:14,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-07-13 20:19:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:14,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:14,646 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:14,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:14,869 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-07-13 20:19:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100559602] [2021-07-13 20:19:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100559602] [2021-07-13 20:19:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100559602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798159419] [2021-07-13 20:19:14,923 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 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 [2021-07-13 20:19:14,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798159419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:15,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871609945] [2021-07-13 20:19:15,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:15,090 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:15,682 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-07-13 20:19:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:19:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:15,685 INFO L225 Difference]: With dead ends: 696 [2021-07-13 20:19:15,685 INFO L226 Difference]: Without dead ends: 652 [2021-07-13 20:19:15,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:19:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-13 20:19:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-07-13 20:19:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-07-13 20:19:15,697 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-07-13 20:19:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:15,697 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-07-13 20:19:15,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-07-13 20:19:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:15,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:15,698 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:15,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:19:15,923 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-07-13 20:19:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:15,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576459724] [2021-07-13 20:19:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:15,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576459724] [2021-07-13 20:19:15,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576459724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292709163] [2021-07-13 20:19:15,986 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 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 [2021-07-13 20:19:16,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292709163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:16,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 20:19:16,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459203212] [2021-07-13 20:19:16,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:16,139 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:16,662 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-07-13 20:19:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:19:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:16,665 INFO L225 Difference]: With dead ends: 654 [2021-07-13 20:19:16,665 INFO L226 Difference]: Without dead ends: 652 [2021-07-13 20:19:16,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-13 20:19:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-07-13 20:19:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-07-13 20:19:16,685 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-07-13 20:19:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:16,686 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-07-13 20:19:16,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-07-13 20:19:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:16,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:16,687 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:19:16,905 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-07-13 20:19:16,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706658549] [2021-07-13 20:19:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706658549] [2021-07-13 20:19:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706658549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614762135] [2021-07-13 20:19:16,959 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 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 [2021-07-13 20:19:16,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:19:16,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:16,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614762135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:17,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 20:19:17,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431895173] [2021-07-13 20:19:17,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:17,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:17,111 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:17,574 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-07-13 20:19:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:19:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:17,576 INFO L225 Difference]: With dead ends: 539 [2021-07-13 20:19:17,576 INFO L226 Difference]: Without dead ends: 535 [2021-07-13 20:19:17,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-13 20:19:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-07-13 20:19:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-07-13 20:19:17,602 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-07-13 20:19:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:17,602 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-07-13 20:19:17,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-07-13 20:19:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:17,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:17,604 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:17,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:19:17,818 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-07-13 20:19:17,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:17,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768791716] [2021-07-13 20:19:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:17,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768791716] [2021-07-13 20:19:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768791716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861601882] [2021-07-13 20:19:17,871 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 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 [2021-07-13 20:19:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:17,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861601882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:18,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 20:19:18,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738173800] [2021-07-13 20:19:18,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:18,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:18,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:18,026 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:18,391 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-07-13 20:19:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:19:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:18,394 INFO L225 Difference]: With dead ends: 593 [2021-07-13 20:19:18,395 INFO L226 Difference]: Without dead ends: 584 [2021-07-13 20:19:18,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:19:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-13 20:19:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-07-13 20:19:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-07-13 20:19:18,406 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-07-13 20:19:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:18,406 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-07-13 20:19:18,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-07-13 20:19:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:18,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:18,408 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:18,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:19:18,633 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-07-13 20:19:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:18,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492199526] [2021-07-13 20:19:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:18,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492199526] [2021-07-13 20:19:18,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492199526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367545080] [2021-07-13 20:19:18,689 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 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 [2021-07-13 20:19:18,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367545080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:18,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205582666] [2021-07-13 20:19:18,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:18,855 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:19,396 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-07-13 20:19:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:19:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:19,399 INFO L225 Difference]: With dead ends: 701 [2021-07-13 20:19:19,399 INFO L226 Difference]: Without dead ends: 687 [2021-07-13 20:19:19,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-13 20:19:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-07-13 20:19:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-07-13 20:19:19,411 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-07-13 20:19:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:19,411 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-07-13 20:19:19,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-07-13 20:19:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:19,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:19,412 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:19,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:19:19,635 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-07-13 20:19:19,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:19,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615389644] [2021-07-13 20:19:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:19,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615389644] [2021-07-13 20:19:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615389644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730915305] [2021-07-13 20:19:19,712 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 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 [2021-07-13 20:19:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730915305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:19,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:19,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832165699] [2021-07-13 20:19:19,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:19,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:19,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:19,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:19,876 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:20,372 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-07-13 20:19:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:19:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:20,375 INFO L225 Difference]: With dead ends: 817 [2021-07-13 20:19:20,375 INFO L226 Difference]: Without dead ends: 817 [2021-07-13 20:19:20,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-07-13 20:19:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-07-13 20:19:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-07-13 20:19:20,394 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-07-13 20:19:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-07-13 20:19:20,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-07-13 20:19:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:20,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:20,395 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:20,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:20,609 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-07-13 20:19:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999763507] [2021-07-13 20:19:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:20,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:20,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999763507] [2021-07-13 20:19:20,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999763507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126005321] [2021-07-13 20:19:20,656 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 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 [2021-07-13 20:19:20,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:20,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:20,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126005321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:20,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:20,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462415022] [2021-07-13 20:19:20,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:20,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:20,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:20,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:20,792 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:21,205 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-07-13 20:19:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:19:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:21,207 INFO L225 Difference]: With dead ends: 578 [2021-07-13 20:19:21,208 INFO L226 Difference]: Without dead ends: 560 [2021-07-13 20:19:21,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-13 20:19:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-07-13 20:19:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-07-13 20:19:21,217 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-07-13 20:19:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:21,217 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-07-13 20:19:21,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-07-13 20:19:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:21,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:21,218 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:21,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:19:21,433 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-07-13 20:19:21,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:21,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090529407] [2021-07-13 20:19:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090529407] [2021-07-13 20:19:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090529407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626866673] [2021-07-13 20:19:21,493 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 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 [2021-07-13 20:19:21,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626866673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144839406] [2021-07-13 20:19:21,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:21,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:21,668 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:22,188 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-07-13 20:19:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:19:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:22,191 INFO L225 Difference]: With dead ends: 943 [2021-07-13 20:19:22,192 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 20:19:22,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:19:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 20:19:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-07-13 20:19:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-07-13 20:19:22,207 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-07-13 20:19:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:22,207 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-07-13 20:19:22,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-07-13 20:19:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:22,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:22,209 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,425 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-07-13 20:19:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203256846] [2021-07-13 20:19:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:22,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:22,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203256846] [2021-07-13 20:19:22,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203256846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867497541] [2021-07-13 20:19:22,466 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 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 [2021-07-13 20:19:22,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:22,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:22,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:22,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867497541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:22,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 20:19:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817386737] [2021-07-13 20:19:22,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:22,614 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:23,031 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-07-13 20:19:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:19:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:23,034 INFO L225 Difference]: With dead ends: 910 [2021-07-13 20:19:23,034 INFO L226 Difference]: Without dead ends: 906 [2021-07-13 20:19:23,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-13 20:19:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-07-13 20:19:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-07-13 20:19:23,047 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-07-13 20:19:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:23,047 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-07-13 20:19:23,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-07-13 20:19:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:23,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:23,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:23,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:19:23,265 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-07-13 20:19:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:23,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073629266] [2021-07-13 20:19:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:23,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073629266] [2021-07-13 20:19:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073629266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99368890] [2021-07-13 20:19:23,310 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 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 [2021-07-13 20:19:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99368890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:23,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:23,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370571906] [2021-07-13 20:19:23,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:23,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:23,450 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:23,864 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-07-13 20:19:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:19:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:23,868 INFO L225 Difference]: With dead ends: 997 [2021-07-13 20:19:23,868 INFO L226 Difference]: Without dead ends: 985 [2021-07-13 20:19:23,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-13 20:19:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-07-13 20:19:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-07-13 20:19:23,885 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-07-13 20:19:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:23,886 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-07-13 20:19:23,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-07-13 20:19:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:23,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:23,888 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:24,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:24,111 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-07-13 20:19:24,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:24,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039469509] [2021-07-13 20:19:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039469509] [2021-07-13 20:19:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039469509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378197564] [2021-07-13 20:19:24,164 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 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 [2021-07-13 20:19:24,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:24,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378197564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:24,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001689587] [2021-07-13 20:19:24,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:24,303 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:24,769 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-07-13 20:19:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:19:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:19:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:24,774 INFO L225 Difference]: With dead ends: 1028 [2021-07-13 20:19:24,774 INFO L226 Difference]: Without dead ends: 1008 [2021-07-13 20:19:24,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 419.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:19:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-13 20:19:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-07-13 20:19:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-07-13 20:19:24,791 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-07-13 20:19:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:24,792 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-07-13 20:19:24,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-07-13 20:19:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:24,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:24,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:25,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:19:25,014 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-07-13 20:19:25,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:25,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102819418] [2021-07-13 20:19:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102819418] [2021-07-13 20:19:25,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102819418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636613837] [2021-07-13 20:19:25,280 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 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 [2021-07-13 20:19:25,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:25,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:19:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:25,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:25,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-07-13 20:19:25,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:25,917 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-07-13 20:19:25,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:19:25,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-07-13 20:19:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636613837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:25,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-07-13 20:19:25,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580673064] [2021-07-13 20:19:25,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:19:25,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:19:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:25,989 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:27,164 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-07-13 20:19:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:19:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:27,167 INFO L225 Difference]: With dead ends: 1044 [2021-07-13 20:19:27,167 INFO L226 Difference]: Without dead ends: 1030 [2021-07-13 20:19:27,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1308.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:19:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-07-13 20:19:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-07-13 20:19:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-07-13 20:19:27,183 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-07-13 20:19:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:27,183 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-07-13 20:19:27,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-07-13 20:19:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:27,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:27,185 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:27,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:27,400 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-07-13 20:19:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370982699] [2021-07-13 20:19:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:27,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370982699] [2021-07-13 20:19:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370982699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489357605] [2021-07-13 20:19:27,673 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 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 [2021-07-13 20:19:27,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:27,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:27,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:27,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:27,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:27,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:27,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:27,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:27,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:27,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489357605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:27,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 20:19:27,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150638232] [2021-07-13 20:19:27,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:27,967 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:29,121 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-07-13 20:19:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:19:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:29,124 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 20:19:29,124 INFO L226 Difference]: Without dead ends: 1066 [2021-07-13 20:19:29,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1107.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:19:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-13 20:19:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-07-13 20:19:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-07-13 20:19:29,138 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-07-13 20:19:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:29,138 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-07-13 20:19:29,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-07-13 20:19:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:29,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:29,141 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:19:29,365 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-07-13 20:19:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491373431] [2021-07-13 20:19:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:29,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491373431] [2021-07-13 20:19:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491373431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405331380] [2021-07-13 20:19:29,638 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 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 [2021-07-13 20:19:29,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:29,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:29,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:29,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:29,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:29,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:29,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:29,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:29,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405331380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:29,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 20:19:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806272456] [2021-07-13 20:19:29,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:29,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:29,941 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:31,404 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-07-13 20:19:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:19:31,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:31,408 INFO L225 Difference]: With dead ends: 1322 [2021-07-13 20:19:31,408 INFO L226 Difference]: Without dead ends: 1313 [2021-07-13 20:19:31,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1443.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:19:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-13 20:19:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-07-13 20:19:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-07-13 20:19:31,425 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-07-13 20:19:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:31,425 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-07-13 20:19:31,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-07-13 20:19:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:31,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:31,427 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:31,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:31,641 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-07-13 20:19:31,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:31,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725426976] [2021-07-13 20:19:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725426976] [2021-07-13 20:19:31,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725426976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390701478] [2021-07-13 20:19:31,867 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 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 [2021-07-13 20:19:31,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:31,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:19:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:32,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:32,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:32,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-07-13 20:19:32,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:32,308 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-07-13 20:19:32,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:32,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-07-13 20:19:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390701478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:32,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:19:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153216595] [2021-07-13 20:19:32,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:19:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:19:32,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:32,330 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:33,166 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-07-13 20:19:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:19:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:33,171 INFO L225 Difference]: With dead ends: 1058 [2021-07-13 20:19:33,171 INFO L226 Difference]: Without dead ends: 1026 [2021-07-13 20:19:33,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:19:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-07-13 20:19:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-07-13 20:19:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-07-13 20:19:33,192 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-07-13 20:19:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:33,192 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-07-13 20:19:33,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-07-13 20:19:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:33,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:33,194 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:33,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:33,413 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-07-13 20:19:33,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:33,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381503349] [2021-07-13 20:19:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381503349] [2021-07-13 20:19:33,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381503349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488656389] [2021-07-13 20:19:33,666 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 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 [2021-07-13 20:19:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:33,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:33,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:33,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:33,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:33,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:33,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:33,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:33,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:33,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:33,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488656389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 20:19:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452603988] [2021-07-13 20:19:33,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:33,968 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:34,851 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-07-13 20:19:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:19:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:34,855 INFO L225 Difference]: With dead ends: 1083 [2021-07-13 20:19:34,855 INFO L226 Difference]: Without dead ends: 1052 [2021-07-13 20:19:34,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:19:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-07-13 20:19:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-07-13 20:19:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-07-13 20:19:34,872 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-07-13 20:19:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,872 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-07-13 20:19:34,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-07-13 20:19:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:34,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:34,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:35,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:19:35,089 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-07-13 20:19:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025504910] [2021-07-13 20:19:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025504910] [2021-07-13 20:19:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025504910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293209998] [2021-07-13 20:19:35,344 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 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 [2021-07-13 20:19:35,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:35,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:35,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:35,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:35,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:35,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:35,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293209998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:35,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 20:19:35,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662064530] [2021-07-13 20:19:35,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:35,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:35,620 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:36,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:36,796 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-07-13 20:19:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:19:36,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:36,801 INFO L225 Difference]: With dead ends: 1238 [2021-07-13 20:19:36,801 INFO L226 Difference]: Without dead ends: 1186 [2021-07-13 20:19:36,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1178.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:19:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-13 20:19:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-07-13 20:19:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-07-13 20:19:36,823 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-07-13 20:19:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:36,823 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-07-13 20:19:36,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-07-13 20:19:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:36,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:36,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:37,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:37,033 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-07-13 20:19:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:37,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263914458] [2021-07-13 20:19:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:37,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263914458] [2021-07-13 20:19:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263914458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714390857] [2021-07-13 20:19:37,314 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 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 [2021-07-13 20:19:37,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:19:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:37,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:19:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:37,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:37,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-07-13 20:19:37,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:19:37,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:37,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:19:37,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-07-13 20:19:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:37,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714390857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:37,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:19:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707884276] [2021-07-13 20:19:37,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:19:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:19:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:37,778 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:39,615 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-07-13 20:19:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:19:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:39,618 INFO L225 Difference]: With dead ends: 1077 [2021-07-13 20:19:39,618 INFO L226 Difference]: Without dead ends: 1042 [2021-07-13 20:19:39,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1744.0ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:19:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-13 20:19:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-07-13 20:19:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-07-13 20:19:39,637 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-07-13 20:19:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:39,637 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-07-13 20:19:39,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-07-13 20:19:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:39,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:39,639 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:39,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:19:39,853 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-07-13 20:19:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:39,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519089008] [2021-07-13 20:19:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:40,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519089008] [2021-07-13 20:19:40,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519089008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603382995] [2021-07-13 20:19:40,144 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 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 [2021-07-13 20:19:40,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:40,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:40,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:40,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:40,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:40,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:40,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:40,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:40,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603382995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:40,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-13 20:19:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599054513] [2021-07-13 20:19:40,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:40,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:40,457 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:41,490 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-07-13 20:19:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:19:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:41,494 INFO L225 Difference]: With dead ends: 1320 [2021-07-13 20:19:41,495 INFO L226 Difference]: Without dead ends: 1283 [2021-07-13 20:19:41,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1036.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:19:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-07-13 20:19:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-07-13 20:19:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-07-13 20:19:41,515 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-07-13 20:19:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:41,515 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-07-13 20:19:41,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-07-13 20:19:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:41,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:41,518 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:41,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:41,743 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-07-13 20:19:41,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:41,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635160319] [2021-07-13 20:19:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:41,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:41,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635160319] [2021-07-13 20:19:41,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635160319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:41,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407950048] [2021-07-13 20:19:41,969 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 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 [2021-07-13 20:19:41,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:41,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:42,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:42,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:42,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:42,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407950048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 20:19:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382967424] [2021-07-13 20:19:42,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:42,261 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:43,125 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-07-13 20:19:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:19:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:43,128 INFO L225 Difference]: With dead ends: 1297 [2021-07-13 20:19:43,128 INFO L226 Difference]: Without dead ends: 1263 [2021-07-13 20:19:43,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 823.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-07-13 20:19:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-07-13 20:19:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-07-13 20:19:43,148 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-07-13 20:19:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:43,148 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-07-13 20:19:43,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-07-13 20:19:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:43,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:43,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:43,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:19:43,375 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-07-13 20:19:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:43,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669879284] [2021-07-13 20:19:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:43,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669879284] [2021-07-13 20:19:43,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669879284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938291299] [2021-07-13 20:19:43,605 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 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 [2021-07-13 20:19:43,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:43,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:19:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:43,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:43,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:43,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-07-13 20:19:43,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:19:44,022 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-07-13 20:19:44,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:44,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-07-13 20:19:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938291299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:44,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-07-13 20:19:44,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973109060] [2021-07-13 20:19:44,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:19:44,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:19:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:44,168 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:46,222 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-07-13 20:19:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:19:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:46,225 INFO L225 Difference]: With dead ends: 1498 [2021-07-13 20:19:46,225 INFO L226 Difference]: Without dead ends: 1436 [2021-07-13 20:19:46,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2033.3ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:19:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-07-13 20:19:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-07-13 20:19:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-07-13 20:19:46,245 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-07-13 20:19:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:46,245 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-07-13 20:19:46,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-07-13 20:19:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:46,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:46,246 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:46,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:19:46,453 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-07-13 20:19:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:46,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116517974] [2021-07-13 20:19:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:46,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116517974] [2021-07-13 20:19:46,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116517974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:46,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479001387] [2021-07-13 20:19:46,714 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 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 [2021-07-13 20:19:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:46,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:46,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:46,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479001387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:46,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:46,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 20:19:46,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641640047] [2021-07-13 20:19:46,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:46,957 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:48,116 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-07-13 20:19:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:19:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:48,118 INFO L225 Difference]: With dead ends: 1318 [2021-07-13 20:19:48,119 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 20:19:48,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1164.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:19:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 20:19:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-07-13 20:19:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-07-13 20:19:48,135 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-07-13 20:19:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:48,135 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-07-13 20:19:48,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-07-13 20:19:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:19:48,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:48,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:48,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:48,338 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-07-13 20:19:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:48,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747155531] [2021-07-13 20:19:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:48,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747155531] [2021-07-13 20:19:48,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747155531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315544102] [2021-07-13 20:19:48,601 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 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 [2021-07-13 20:19:48,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:19:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:48,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:48,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:48,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-13 20:19:48,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:48,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:48,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:48,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-13 20:19:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:48,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315544102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:48,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:48,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-13 20:19:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357754811] [2021-07-13 20:19:48,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:48,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:48,869 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:50,010 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-07-13 20:19:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:19:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:19:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:50,013 INFO L225 Difference]: With dead ends: 1252 [2021-07-13 20:19:50,014 INFO L226 Difference]: Without dead ends: 1245 [2021-07-13 20:19:50,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1131.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:19:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-07-13 20:19:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-07-13 20:19:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-07-13 20:19:50,035 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-07-13 20:19:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:50,035 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-07-13 20:19:50,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-07-13 20:19:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:50,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:50,038 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:50,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:50,253 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-07-13 20:19:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:50,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517816842] [2021-07-13 20:19:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:50,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517816842] [2021-07-13 20:19:50,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517816842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132208929] [2021-07-13 20:19:50,346 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 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 [2021-07-13 20:19:50,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:50,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:50,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132208929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:50,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:19:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146720802] [2021-07-13 20:19:50,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:19:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:19:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:50,553 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:51,296 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-07-13 20:19:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:51,300 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:19:51,300 INFO L226 Difference]: Without dead ends: 1649 [2021-07-13 20:19:51,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:19:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-07-13 20:19:51,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-07-13 20:19:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-07-13 20:19:51,320 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-07-13 20:19:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:51,320 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-07-13 20:19:51,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-07-13 20:19:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:51,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:51,322 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:51,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:51,537 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-07-13 20:19:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:51,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592227017] [2021-07-13 20:19:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:51,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592227017] [2021-07-13 20:19:51,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592227017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587628856] [2021-07-13 20:19:51,612 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 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 [2021-07-13 20:19:51,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:51,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:51,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587628856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:51,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818299655] [2021-07-13 20:19:51,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:51,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:51,794 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:52,762 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-07-13 20:19:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:19:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:52,766 INFO L225 Difference]: With dead ends: 2079 [2021-07-13 20:19:52,766 INFO L226 Difference]: Without dead ends: 2008 [2021-07-13 20:19:52,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:19:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-13 20:19:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-07-13 20:19:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-07-13 20:19:52,798 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-07-13 20:19:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:52,799 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-07-13 20:19:52,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-07-13 20:19:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:52,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:52,801 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:19:53,017 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-07-13 20:19:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441459243] [2021-07-13 20:19:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:53,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441459243] [2021-07-13 20:19:53,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441459243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233147630] [2021-07-13 20:19:53,070 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 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 [2021-07-13 20:19:53,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:53,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233147630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:53,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:53,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 20:19:53,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575675908] [2021-07-13 20:19:53,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:53,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:53,242 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:54,106 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-07-13 20:19:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:19:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:54,111 INFO L225 Difference]: With dead ends: 2322 [2021-07-13 20:19:54,112 INFO L226 Difference]: Without dead ends: 2316 [2021-07-13 20:19:54,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 772.2ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:19:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-07-13 20:19:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-07-13 20:19:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-07-13 20:19:54,147 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-07-13 20:19:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:54,147 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-07-13 20:19:54,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-07-13 20:19:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:54,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:54,150 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:54,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:54,364 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-07-13 20:19:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:54,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689618823] [2021-07-13 20:19:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:54,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689618823] [2021-07-13 20:19:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689618823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:54,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140537530] [2021-07-13 20:19:54,418 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 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 [2021-07-13 20:19:54,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:19:54,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:54,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140537530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:54,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:54,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 20:19:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880491875] [2021-07-13 20:19:54,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:54,608 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:55,278 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-07-13 20:19:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:19:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:55,282 INFO L225 Difference]: With dead ends: 1833 [2021-07-13 20:19:55,282 INFO L226 Difference]: Without dead ends: 1829 [2021-07-13 20:19:55,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 628.2ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:19:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-13 20:19:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-07-13 20:19:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-07-13 20:19:55,317 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-07-13 20:19:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:55,317 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-07-13 20:19:55,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-07-13 20:19:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:55,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:55,320 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:55,533 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-07-13 20:19:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:55,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068674972] [2021-07-13 20:19:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:55,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:55,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068674972] [2021-07-13 20:19:55,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068674972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:55,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730858514] [2021-07-13 20:19:55,583 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 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 [2021-07-13 20:19:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:55,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730858514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:55,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:55,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 20:19:55,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242764511] [2021-07-13 20:19:55,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:55,759 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:56,325 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-07-13 20:19:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:19:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:56,330 INFO L225 Difference]: With dead ends: 2126 [2021-07-13 20:19:56,330 INFO L226 Difference]: Without dead ends: 2117 [2021-07-13 20:19:56,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:19:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-07-13 20:19:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-07-13 20:19:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-07-13 20:19:56,368 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-07-13 20:19:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:56,368 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-07-13 20:19:56,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-07-13 20:19:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:56,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:56,370 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:56,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:19:56,594 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:56,594 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-07-13 20:19:56,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:56,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015792626] [2021-07-13 20:19:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015792626] [2021-07-13 20:19:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015792626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996911593] [2021-07-13 20:19:56,659 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 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 [2021-07-13 20:19:56,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:56,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996911593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:56,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-13 20:19:56,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632973393] [2021-07-13 20:19:56,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:56,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:56,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:56,830 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:57,528 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-07-13 20:19:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:19:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:57,532 INFO L225 Difference]: With dead ends: 2217 [2021-07-13 20:19:57,533 INFO L226 Difference]: Without dead ends: 2207 [2021-07-13 20:19:57,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:19:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-13 20:19:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-07-13 20:19:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-07-13 20:19:57,564 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-07-13 20:19:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:57,564 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-07-13 20:19:57,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-07-13 20:19:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:57,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:57,567 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:57,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:19:57,781 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-07-13 20:19:57,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:57,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206189145] [2021-07-13 20:19:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:57,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:57,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206189145] [2021-07-13 20:19:57,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206189145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349148697] [2021-07-13 20:19:57,846 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 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 [2021-07-13 20:19:57,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:19:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:57,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349148697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:19:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749152837] [2021-07-13 20:19:58,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:58,046 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:58,757 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-07-13 20:19:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:19:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:19:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:58,761 INFO L225 Difference]: With dead ends: 2439 [2021-07-13 20:19:58,761 INFO L226 Difference]: Without dead ends: 2417 [2021-07-13 20:19:58,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:19:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-13 20:19:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-07-13 20:19:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-07-13 20:19:58,796 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-07-13 20:19:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:58,796 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-07-13 20:19:58,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-07-13 20:19:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:19:58,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:58,798 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:59,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:19:59,022 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-07-13 20:19:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:59,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474042458] [2021-07-13 20:19:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:59,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474042458] [2021-07-13 20:19:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474042458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701110663] [2021-07-13 20:19:59,112 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 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 [2021-07-13 20:19:59,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:59,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701110663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:59,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:59,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499312479] [2021-07-13 20:19:59,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:59,298 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:00,082 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-07-13 20:20:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:20:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:00,085 INFO L225 Difference]: With dead ends: 2405 [2021-07-13 20:20:00,086 INFO L226 Difference]: Without dead ends: 2405 [2021-07-13 20:20:00,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:20:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-13 20:20:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-07-13 20:20:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-07-13 20:20:00,107 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-07-13 20:20:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:00,107 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-07-13 20:20:00,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-07-13 20:20:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:00,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:00,109 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:00,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:00,310 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-07-13 20:20:00,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:00,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20395971] [2021-07-13 20:20:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:00,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20395971] [2021-07-13 20:20:00,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20395971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280215611] [2021-07-13 20:20:00,374 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 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 [2021-07-13 20:20:00,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:20:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:00,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280215611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:00,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:20:00,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161009869] [2021-07-13 20:20:00,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:00,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:00,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:00,584 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:01,331 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-07-13 20:20:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:20:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:01,335 INFO L225 Difference]: With dead ends: 1806 [2021-07-13 20:20:01,335 INFO L226 Difference]: Without dead ends: 1767 [2021-07-13 20:20:01,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:20:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-13 20:20:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-07-13 20:20:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-07-13 20:20:01,353 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-07-13 20:20:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:01,353 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-07-13 20:20:01,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-07-13 20:20:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:01,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:01,355 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:01,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:01,557 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-07-13 20:20:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802030225] [2021-07-13 20:20:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:01,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802030225] [2021-07-13 20:20:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802030225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252114384] [2021-07-13 20:20:01,624 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 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 [2021-07-13 20:20:01,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252114384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:01,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:20:01,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917935512] [2021-07-13 20:20:01,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:01,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:01,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:01,831 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:02,644 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-07-13 20:20:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:20:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:02,647 INFO L225 Difference]: With dead ends: 2351 [2021-07-13 20:20:02,647 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 20:20:02,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:20:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 20:20:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-07-13 20:20:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-07-13 20:20:02,669 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-07-13 20:20:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:02,670 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-07-13 20:20:02,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-07-13 20:20:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:02,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:02,671 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:02,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:02,872 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-07-13 20:20:02,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:02,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934323310] [2021-07-13 20:20:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:02,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934323310] [2021-07-13 20:20:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934323310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:02,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195299482] [2021-07-13 20:20:02,935 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 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 [2021-07-13 20:20:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195299482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:03,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-13 20:20:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4656350] [2021-07-13 20:20:03,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:20:03,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:20:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:20:03,136 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:03,762 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-07-13 20:20:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:20:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:03,765 INFO L225 Difference]: With dead ends: 1783 [2021-07-13 20:20:03,765 INFO L226 Difference]: Without dead ends: 1765 [2021-07-13 20:20:03,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:20:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-07-13 20:20:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-07-13 20:20:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-07-13 20:20:03,786 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-07-13 20:20:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:03,786 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-07-13 20:20:03,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-07-13 20:20:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:03,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:03,788 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:03,989 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-07-13 20:20:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554742477] [2021-07-13 20:20:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:04,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:04,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554742477] [2021-07-13 20:20:04,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554742477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305370717] [2021-07-13 20:20:04,050 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 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 [2021-07-13 20:20:04,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:04,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305370717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:04,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-13 20:20:04,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102632002] [2021-07-13 20:20:04,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:20:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:04,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:20:04,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:20:04,240 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:05,312 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-07-13 20:20:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:20:05,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:05,317 INFO L225 Difference]: With dead ends: 2870 [2021-07-13 20:20:05,317 INFO L226 Difference]: Without dead ends: 2870 [2021-07-13 20:20:05,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 927.3ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:20:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-07-13 20:20:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-07-13 20:20:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-07-13 20:20:05,354 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-07-13 20:20:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:05,354 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-07-13 20:20:05,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-07-13 20:20:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:05,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:05,357 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:05,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:20:05,558 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-07-13 20:20:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:05,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286185084] [2021-07-13 20:20:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:05,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286185084] [2021-07-13 20:20:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286185084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665649303] [2021-07-13 20:20:05,624 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 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 [2021-07-13 20:20:05,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:05,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:05,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665649303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:05,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:05,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 20:20:05,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076285909] [2021-07-13 20:20:05,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:20:05,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:20:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:20:05,804 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:06,404 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-07-13 20:20:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:20:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:06,408 INFO L225 Difference]: With dead ends: 2793 [2021-07-13 20:20:06,408 INFO L226 Difference]: Without dead ends: 2789 [2021-07-13 20:20:06,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:20:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-07-13 20:20:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-07-13 20:20:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-07-13 20:20:06,444 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-07-13 20:20:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:06,444 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-07-13 20:20:06,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-07-13 20:20:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:06,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:06,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:06,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:06,647 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-07-13 20:20:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:06,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564212703] [2021-07-13 20:20:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:06,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564212703] [2021-07-13 20:20:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564212703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708053596] [2021-07-13 20:20:06,697 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 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 [2021-07-13 20:20:06,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708053596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:06,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-13 20:20:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78195062] [2021-07-13 20:20:06,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:20:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:20:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:20:06,860 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:07,457 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-07-13 20:20:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:20:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:07,461 INFO L225 Difference]: With dead ends: 2987 [2021-07-13 20:20:07,461 INFO L226 Difference]: Without dead ends: 2975 [2021-07-13 20:20:07,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:20:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-07-13 20:20:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-07-13 20:20:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-07-13 20:20:07,498 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-07-13 20:20:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-07-13 20:20:07,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-07-13 20:20:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:07,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:07,501 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:07,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:20:07,701 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-07-13 20:20:07,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:07,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447729827] [2021-07-13 20:20:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:07,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:07,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447729827] [2021-07-13 20:20:07,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447729827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:07,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668500052] [2021-07-13 20:20:07,767 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 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 [2021-07-13 20:20:07,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:07,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:07,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:07,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668500052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:07,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:07,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:20:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299714665] [2021-07-13 20:20:07,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:07,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:07,977 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:08,652 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-07-13 20:20:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:08,657 INFO L225 Difference]: With dead ends: 3282 [2021-07-13 20:20:08,657 INFO L226 Difference]: Without dead ends: 3262 [2021-07-13 20:20:08,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:20:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-07-13 20:20:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-07-13 20:20:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-07-13 20:20:08,722 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-07-13 20:20:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:08,722 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-07-13 20:20:08,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-07-13 20:20:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:20:08,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:08,726 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:08,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:20:08,927 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-07-13 20:20:08,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:08,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528620123] [2021-07-13 20:20:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:09,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:09,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528620123] [2021-07-13 20:20:09,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528620123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643497418] [2021-07-13 20:20:09,011 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 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 [2021-07-13 20:20:09,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:09,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:09,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643497418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:09,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:09,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:20:09,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849936431] [2021-07-13 20:20:09,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:09,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:09,192 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:09,903 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-07-13 20:20:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:20:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:20:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:09,910 INFO L225 Difference]: With dead ends: 3390 [2021-07-13 20:20:09,910 INFO L226 Difference]: Without dead ends: 3362 [2021-07-13 20:20:09,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:20:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-07-13 20:20:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-07-13 20:20:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-07-13 20:20:09,957 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-07-13 20:20:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:09,957 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-07-13 20:20:09,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-07-13 20:20:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:09,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:09,960 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:10,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:10,173 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-07-13 20:20:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:10,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304965973] [2021-07-13 20:20:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:10,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304965973] [2021-07-13 20:20:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304965973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817141463] [2021-07-13 20:20:10,464 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 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 [2021-07-13 20:20:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:10,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:10,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:10,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:10,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:10,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817141463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:10,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:10,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:20:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579264441] [2021-07-13 20:20:10,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:10,843 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:12,613 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-07-13 20:20:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:20:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:12,620 INFO L225 Difference]: With dead ends: 3814 [2021-07-13 20:20:12,620 INFO L226 Difference]: Without dead ends: 3807 [2021-07-13 20:20:12,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1657.0ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:20:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-07-13 20:20:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-07-13 20:20:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-07-13 20:20:12,673 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-07-13 20:20:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:12,673 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-07-13 20:20:12,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-07-13 20:20:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:12,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:12,677 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:12,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:20:12,878 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-07-13 20:20:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:12,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204479422] [2021-07-13 20:20:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:13,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204479422] [2021-07-13 20:20:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204479422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503453463] [2021-07-13 20:20:13,188 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 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 [2021-07-13 20:20:13,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:13,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:13,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:13,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:13,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:13,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:13,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:13,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:13,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:13,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503453463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:13,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:20:13,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565893151] [2021-07-13 20:20:13,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:13,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:13,535 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:15,047 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-07-13 20:20:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:20:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:15,052 INFO L225 Difference]: With dead ends: 3790 [2021-07-13 20:20:15,053 INFO L226 Difference]: Without dead ends: 3739 [2021-07-13 20:20:15,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1442.5ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:20:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-13 20:20:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-07-13 20:20:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-07-13 20:20:15,095 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-07-13 20:20:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-07-13 20:20:15,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-07-13 20:20:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:15,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:15,099 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:15,299 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-07-13 20:20:15,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:15,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627148656] [2021-07-13 20:20:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:15,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627148656] [2021-07-13 20:20:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627148656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465532457] [2021-07-13 20:20:15,624 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 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 [2021-07-13 20:20:15,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:15,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:15,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:20:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:16,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:16,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:16,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-07-13 20:20:16,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-07-13 20:20:16,816 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-07-13 20:20:16,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:20:16,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-07-13 20:20:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465532457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:16,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:16,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-07-13 20:20:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710826829] [2021-07-13 20:20:16,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:20:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:16,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:20:16,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:16,894 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:18,957 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-07-13 20:20:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:20:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:18,964 INFO L225 Difference]: With dead ends: 3918 [2021-07-13 20:20:18,965 INFO L226 Difference]: Without dead ends: 3872 [2021-07-13 20:20:18,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1914.8ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:20:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-07-13 20:20:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-07-13 20:20:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-07-13 20:20:19,022 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-07-13 20:20:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:19,023 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-07-13 20:20:19,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-07-13 20:20:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:19,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:19,028 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:19,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-07-13 20:20:19,253 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-07-13 20:20:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:19,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693357011] [2021-07-13 20:20:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:19,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:19,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693357011] [2021-07-13 20:20:19,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693357011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:19,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23854115] [2021-07-13 20:20:19,636 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 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 [2021-07-13 20:20:19,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:19,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:19,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:19,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:19,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:19,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:19,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:19,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:19,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:19,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:19,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23854115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:19,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:19,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:20:19,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392438620] [2021-07-13 20:20:19,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:19,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:19,980 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:21,491 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-07-13 20:20:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:20:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:21,498 INFO L225 Difference]: With dead ends: 4132 [2021-07-13 20:20:21,498 INFO L226 Difference]: Without dead ends: 4099 [2021-07-13 20:20:21,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1619.4ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:20:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-07-13 20:20:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-07-13 20:20:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-07-13 20:20:21,548 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-07-13 20:20:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:21,548 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-07-13 20:20:21,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-07-13 20:20:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:21,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:21,552 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:21,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:21,774 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-07-13 20:20:21,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:21,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508048242] [2021-07-13 20:20:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:22,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:22,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508048242] [2021-07-13 20:20:22,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508048242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:22,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776187693] [2021-07-13 20:20:22,107 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 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 [2021-07-13 20:20:22,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:22,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:22,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:22,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:22,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:22,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776187693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:22,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:22,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:20:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878007689] [2021-07-13 20:20:22,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:22,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:22,443 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:24,381 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-07-13 20:20:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:20:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:24,388 INFO L225 Difference]: With dead ends: 4375 [2021-07-13 20:20:24,388 INFO L226 Difference]: Without dead ends: 4366 [2021-07-13 20:20:24,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1899.2ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:20:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-07-13 20:20:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-07-13 20:20:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-07-13 20:20:24,436 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-07-13 20:20:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:24,436 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-07-13 20:20:24,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-07-13 20:20:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:24,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:24,440 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:24,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:20:24,641 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-07-13 20:20:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:24,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150545046] [2021-07-13 20:20:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:24,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:24,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150545046] [2021-07-13 20:20:24,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150545046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:24,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304381047] [2021-07-13 20:20:24,882 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 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 [2021-07-13 20:20:24,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:24,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:25,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:25,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:25,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:25,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:25,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:25,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:25,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304381047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:25,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:25,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:25,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646527744] [2021-07-13 20:20:25,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:25,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:25,252 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:26,957 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-07-13 20:20:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:20:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:26,964 INFO L225 Difference]: With dead ends: 4391 [2021-07-13 20:20:26,964 INFO L226 Difference]: Without dead ends: 4352 [2021-07-13 20:20:26,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:20:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-07-13 20:20:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-07-13 20:20:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-07-13 20:20:27,013 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-07-13 20:20:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:27,013 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-07-13 20:20:27,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-07-13 20:20:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:27,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:27,017 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:27,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:20:27,218 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-07-13 20:20:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:27,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24685374] [2021-07-13 20:20:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:27,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24685374] [2021-07-13 20:20:27,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24685374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856372486] [2021-07-13 20:20:27,494 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 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 [2021-07-13 20:20:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:27,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:27,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:27,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:27,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:27,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:27,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:27,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:27,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:27,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856372486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:27,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:27,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:20:27,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881193979] [2021-07-13 20:20:27,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:27,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:27,861 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:29,436 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-07-13 20:20:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:20:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:29,441 INFO L225 Difference]: With dead ends: 3557 [2021-07-13 20:20:29,442 INFO L226 Difference]: Without dead ends: 3530 [2021-07-13 20:20:29,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1564.0ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:20:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-07-13 20:20:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-07-13 20:20:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-07-13 20:20:29,493 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-07-13 20:20:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:29,493 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-07-13 20:20:29,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-07-13 20:20:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:29,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:29,498 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:29,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 20:20:29,699 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-07-13 20:20:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:29,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32741062] [2021-07-13 20:20:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:29,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32741062] [2021-07-13 20:20:29,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32741062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:29,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273864155] [2021-07-13 20:20:29,928 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 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 [2021-07-13 20:20:29,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:29,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:30,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:30,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:30,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:30,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273864155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:30,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:30,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879363665] [2021-07-13 20:20:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:30,245 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:31,674 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-07-13 20:20:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:20:31,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:31,681 INFO L225 Difference]: With dead ends: 4594 [2021-07-13 20:20:31,681 INFO L226 Difference]: Without dead ends: 4561 [2021-07-13 20:20:31,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1408.7ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:20:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-07-13 20:20:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-07-13 20:20:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-07-13 20:20:31,737 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-07-13 20:20:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:31,737 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-07-13 20:20:31,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-07-13 20:20:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:31,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:31,742 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:20:31,953 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-07-13 20:20:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276965014] [2021-07-13 20:20:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:20:32,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276965014] [2021-07-13 20:20:32,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276965014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311701961] [2021-07-13 20:20:32,361 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 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 [2021-07-13 20:20:32,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:32,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:20:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:32,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:32,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:33,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:33,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-07-13 20:20:33,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-13 20:20:33,322 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-07-13 20:20:33,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:33,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-07-13 20:20:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:33,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311701961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:33,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:33,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-13 20:20:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536808404] [2021-07-13 20:20:33,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:20:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:33,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:20:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:33,479 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:36,802 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-07-13 20:20:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:20:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:36,810 INFO L225 Difference]: With dead ends: 4752 [2021-07-13 20:20:36,810 INFO L226 Difference]: Without dead ends: 4721 [2021-07-13 20:20:36,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3372.9ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:20:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-07-13 20:20:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-07-13 20:20:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-07-13 20:20:36,875 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-07-13 20:20:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:36,875 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-07-13 20:20:36,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-07-13 20:20:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:36,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:36,879 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:37,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 20:20:37,080 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-07-13 20:20:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:37,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202955136] [2021-07-13 20:20:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:20:37,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:37,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202955136] [2021-07-13 20:20:37,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202955136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:37,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959638495] [2021-07-13 20:20:37,457 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 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 [2021-07-13 20:20:37,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:37,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:37,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:37,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:37,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:37,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:37,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:37,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959638495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:37,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:37,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:20:37,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206938066] [2021-07-13 20:20:37,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:37,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:37,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:37,789 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:39,458 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-07-13 20:20:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:20:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:39,464 INFO L225 Difference]: With dead ends: 3751 [2021-07-13 20:20:39,464 INFO L226 Difference]: Without dead ends: 3733 [2021-07-13 20:20:39,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1604.2ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:20:39,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-07-13 20:20:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-07-13 20:20:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-07-13 20:20:39,508 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-07-13 20:20:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:39,508 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-07-13 20:20:39,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-07-13 20:20:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:39,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:39,513 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:39,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-07-13 20:20:39,734 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-07-13 20:20:39,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:39,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018377136] [2021-07-13 20:20:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:39,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:39,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018377136] [2021-07-13 20:20:39,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018377136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:39,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321055667] [2021-07-13 20:20:39,976 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 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 [2021-07-13 20:20:40,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:20:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:40,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:40,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:40,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:40,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:40,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:40,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:40,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321055667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:40,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:40,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:40,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249181333] [2021-07-13 20:20:40,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:40,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:40,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:40,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:40,292 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:41,073 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-07-13 20:20:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:20:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:41,079 INFO L225 Difference]: With dead ends: 3590 [2021-07-13 20:20:41,079 INFO L226 Difference]: Without dead ends: 3563 [2021-07-13 20:20:41,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 827.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:20:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-13 20:20:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-07-13 20:20:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-07-13 20:20:41,150 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-07-13 20:20:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:41,150 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-07-13 20:20:41,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-07-13 20:20:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:41,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:41,154 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:41,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:41,355 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:41,355 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-07-13 20:20:41,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:41,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646906391] [2021-07-13 20:20:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:41,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646906391] [2021-07-13 20:20:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646906391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278240909] [2021-07-13 20:20:41,607 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 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 [2021-07-13 20:20:41,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:20:41,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:41,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:20:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:41,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:41,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:41,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:41,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:42,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-07-13 20:20:42,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:42,096 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-07-13 20:20:42,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:42,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-07-13 20:20:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278240909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:42,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:42,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-13 20:20:42,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033406341] [2021-07-13 20:20:42,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:20:42,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:42,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:20:42,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:42,207 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:44,940 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-07-13 20:20:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:20:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:44,947 INFO L225 Difference]: With dead ends: 4934 [2021-07-13 20:20:44,947 INFO L226 Difference]: Without dead ends: 4898 [2021-07-13 20:20:44,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2624.4ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:20:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-07-13 20:20:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-07-13 20:20:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-07-13 20:20:45,007 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-07-13 20:20:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:45,007 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-07-13 20:20:45,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-07-13 20:20:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:45,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:45,011 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:45,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:45,213 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-07-13 20:20:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:45,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956083501] [2021-07-13 20:20:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:45,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:45,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956083501] [2021-07-13 20:20:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956083501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:45,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694030331] [2021-07-13 20:20:45,482 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 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 [2021-07-13 20:20:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:45,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:45,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:45,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:45,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:45,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:45,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:45,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694030331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:45,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:45,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:45,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445172303] [2021-07-13 20:20:45,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:45,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:45,846 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:47,461 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-07-13 20:20:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:20:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:47,467 INFO L225 Difference]: With dead ends: 3897 [2021-07-13 20:20:47,467 INFO L226 Difference]: Without dead ends: 3871 [2021-07-13 20:20:47,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1499.5ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:20:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-07-13 20:20:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-07-13 20:20:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-07-13 20:20:47,513 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-07-13 20:20:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:47,513 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-07-13 20:20:47,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-07-13 20:20:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:47,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:47,516 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:47,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 20:20:47,716 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-07-13 20:20:47,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:47,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120196664] [2021-07-13 20:20:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:48,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120196664] [2021-07-13 20:20:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120196664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665452846] [2021-07-13 20:20:48,007 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 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 [2021-07-13 20:20:48,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:48,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:48,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:48,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:48,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:48,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:48,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:48,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:48,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:48,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665452846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:48,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:48,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:48,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198426313] [2021-07-13 20:20:48,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:48,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:48,293 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:50,202 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-07-13 20:20:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:20:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:50,208 INFO L225 Difference]: With dead ends: 3917 [2021-07-13 20:20:50,209 INFO L226 Difference]: Without dead ends: 3891 [2021-07-13 20:20:50,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1679.3ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:20:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-07-13 20:20:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-07-13 20:20:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-07-13 20:20:50,259 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-07-13 20:20:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:50,260 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-07-13 20:20:50,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-07-13 20:20:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:50,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:50,263 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 20:20:50,464 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-07-13 20:20:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321240104] [2021-07-13 20:20:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:50,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:50,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321240104] [2021-07-13 20:20:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321240104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:50,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603441195] [2021-07-13 20:20:50,740 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 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 [2021-07-13 20:20:50,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:50,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:50,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:20:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:51,270 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-13 20:20:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:51,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:51,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:51,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-07-13 20:20:51,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:20:52,018 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-07-13 20:20:52,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:52,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-07-13 20:20:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603441195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:52,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:52,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-13 20:20:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628951977] [2021-07-13 20:20:52,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:20:52,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:20:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:52,134 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,884 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-07-13 20:20:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:55,592 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-07-13 20:20:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:20:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:55,598 INFO L225 Difference]: With dead ends: 4685 [2021-07-13 20:20:55,598 INFO L226 Difference]: Without dead ends: 4633 [2021-07-13 20:20:55,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3487.0ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:20:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-07-13 20:20:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-07-13 20:20:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-07-13 20:20:55,659 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-07-13 20:20:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:55,659 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-07-13 20:20:55,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-07-13 20:20:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:55,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:55,663 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:55,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:20:55,864 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-07-13 20:20:55,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:55,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460678748] [2021-07-13 20:20:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460678748] [2021-07-13 20:20:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460678748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335436152] [2021-07-13 20:20:56,141 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 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 [2021-07-13 20:20:56,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:56,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:56,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:56,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:56,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:56,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:56,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:56,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335436152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:56,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:20:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989744908] [2021-07-13 20:20:56,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:20:56,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:20:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:56,455 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,823 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-07-13 20:20:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:20:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,829 INFO L225 Difference]: With dead ends: 3767 [2021-07-13 20:20:57,829 INFO L226 Difference]: Without dead ends: 3736 [2021-07-13 20:20:57,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1294.0ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:20:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-07-13 20:20:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-07-13 20:20:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-07-13 20:20:57,872 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-07-13 20:20:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,872 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-07-13 20:20:57,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-07-13 20:20:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:20:57,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,877 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:58,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:58,077 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-07-13 20:20:58,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:58,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437920140] [2021-07-13 20:20:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:58,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437920140] [2021-07-13 20:20:58,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437920140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360687941] [2021-07-13 20:20:58,399 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 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 [2021-07-13 20:20:58,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:58,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:58,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:20:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:20:58,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:20:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360687941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:58,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:20:58,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488744110] [2021-07-13 20:20:58,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:58,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:58,798 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:00,199 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-07-13 20:21:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:21:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:00,206 INFO L225 Difference]: With dead ends: 4784 [2021-07-13 20:21:00,206 INFO L226 Difference]: Without dead ends: 4733 [2021-07-13 20:21:00,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1443.8ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:21:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-07-13 20:21:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-07-13 20:21:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-07-13 20:21:00,257 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-07-13 20:21:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:00,257 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-07-13 20:21:00,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-07-13 20:21:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:00,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:00,260 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:00,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-13 20:21:00,461 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-07-13 20:21:00,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:00,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930837332] [2021-07-13 20:21:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:00,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:00,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930837332] [2021-07-13 20:21:00,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930837332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:00,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197045587] [2021-07-13 20:21:00,714 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 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 [2021-07-13 20:21:00,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:21:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:00,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:21:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:01,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:01,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:01,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:01,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-07-13 20:21:01,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:21:01,208 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-07-13 20:21:01,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:01,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-07-13 20:21:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:01,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197045587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:01,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:01,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-13 20:21:01,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257350436] [2021-07-13 20:21:01,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:01,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:01,312 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:04,170 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-07-13 20:21:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:21:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:04,178 INFO L225 Difference]: With dead ends: 4909 [2021-07-13 20:21:04,178 INFO L226 Difference]: Without dead ends: 4866 [2021-07-13 20:21:04,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2860.4ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:21:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-07-13 20:21:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-07-13 20:21:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-07-13 20:21:04,243 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-07-13 20:21:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:04,243 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-07-13 20:21:04,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-07-13 20:21:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:04,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:04,247 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:04,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:04,448 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-07-13 20:21:04,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:04,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201154526] [2021-07-13 20:21:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:04,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201154526] [2021-07-13 20:21:04,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201154526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:04,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436432133] [2021-07-13 20:21:04,694 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 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 [2021-07-13 20:21:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:04,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:04,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:04,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:04,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:04,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436432133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:04,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:04,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:04,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134355480] [2021-07-13 20:21:04,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:04,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:04,992 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:06,427 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-07-13 20:21:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:21:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:06,432 INFO L225 Difference]: With dead ends: 3927 [2021-07-13 20:21:06,432 INFO L226 Difference]: Without dead ends: 3899 [2021-07-13 20:21:06,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1364.2ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:21:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-07-13 20:21:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-07-13 20:21:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-07-13 20:21:06,478 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-07-13 20:21:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-07-13 20:21:06,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-07-13 20:21:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:06,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:06,483 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:06,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-13 20:21:06,683 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-07-13 20:21:06,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:06,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682291405] [2021-07-13 20:21:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:06,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682291405] [2021-07-13 20:21:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682291405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329829772] [2021-07-13 20:21:06,967 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 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 [2021-07-13 20:21:06,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:06,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:06,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:07,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:07,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:07,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:07,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329829772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:07,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801901673] [2021-07-13 20:21:07,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:07,351 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:08,296 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-07-13 20:21:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:21:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:08,303 INFO L225 Difference]: With dead ends: 4402 [2021-07-13 20:21:08,303 INFO L226 Difference]: Without dead ends: 4365 [2021-07-13 20:21:08,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1021.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:21:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-07-13 20:21:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-07-13 20:21:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-07-13 20:21:08,369 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-07-13 20:21:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:08,369 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-07-13 20:21:08,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-07-13 20:21:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:08,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:08,373 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:08,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-13 20:21:08,574 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-07-13 20:21:08,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:08,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541726162] [2021-07-13 20:21:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:08,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541726162] [2021-07-13 20:21:08,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541726162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158952342] [2021-07-13 20:21:08,869 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 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 [2021-07-13 20:21:08,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:21:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:08,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:21:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:09,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:09,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-07-13 20:21:09,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:21:09,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:09,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:09,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-07-13 20:21:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158952342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:09,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:09,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-13 20:21:09,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828099567] [2021-07-13 20:21:09,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:09,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:09,634 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:12,308 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-07-13 20:21:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:21:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:12,315 INFO L225 Difference]: With dead ends: 4724 [2021-07-13 20:21:12,315 INFO L226 Difference]: Without dead ends: 4685 [2021-07-13 20:21:12,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2557.3ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:21:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-07-13 20:21:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-07-13 20:21:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-07-13 20:21:12,375 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-07-13 20:21:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:12,375 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-07-13 20:21:12,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-07-13 20:21:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:12,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:12,382 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:12,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-13 20:21:12,605 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-07-13 20:21:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:12,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469038500] [2021-07-13 20:21:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:12,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:12,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469038500] [2021-07-13 20:21:12,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469038500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:12,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507953821] [2021-07-13 20:21:12,842 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 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 [2021-07-13 20:21:12,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:12,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:12,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:13,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:13,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:13,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:13,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:13,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:13,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507953821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:13,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:13,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515089671] [2021-07-13 20:21:13,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:13,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:13,157 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:15,220 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-07-13 20:21:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:21:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:15,227 INFO L225 Difference]: With dead ends: 4964 [2021-07-13 20:21:15,227 INFO L226 Difference]: Without dead ends: 4899 [2021-07-13 20:21:15,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1802.1ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:21:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-13 20:21:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-07-13 20:21:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-07-13 20:21:15,286 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-07-13 20:21:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:15,287 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-07-13 20:21:15,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-07-13 20:21:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:15,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:15,291 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:21:15,492 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:15,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-07-13 20:21:15,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:15,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395068795] [2021-07-13 20:21:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:15,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:15,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395068795] [2021-07-13 20:21:15,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395068795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213888] [2021-07-13 20:21:15,779 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 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 [2021-07-13 20:21:15,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:21:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:15,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:16,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:16,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:16,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:16,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:16,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734151478] [2021-07-13 20:21:16,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:16,154 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:17,921 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-07-13 20:21:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:21:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:17,929 INFO L225 Difference]: With dead ends: 4760 [2021-07-13 20:21:17,930 INFO L226 Difference]: Without dead ends: 4720 [2021-07-13 20:21:17,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1650.8ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:21:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-07-13 20:21:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-07-13 20:21:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-07-13 20:21:17,991 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-07-13 20:21:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:17,991 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-07-13 20:21:17,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-07-13 20:21:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:17,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:17,999 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:18,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:18,222 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-07-13 20:21:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:18,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534512630] [2021-07-13 20:21:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534512630] [2021-07-13 20:21:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534512630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133739453] [2021-07-13 20:21:18,583 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 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 [2021-07-13 20:21:18,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:21:18,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:18,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:18,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:18,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:18,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:18,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:18,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:18,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:18,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133739453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:18,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:18,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:21:18,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001346479] [2021-07-13 20:21:18,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:18,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:18,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:18,945 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:21,152 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-07-13 20:21:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:21:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:21,159 INFO L225 Difference]: With dead ends: 4832 [2021-07-13 20:21:21,159 INFO L226 Difference]: Without dead ends: 4777 [2021-07-13 20:21:21,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2016.4ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:21:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-07-13 20:21:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-07-13 20:21:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-07-13 20:21:21,220 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-07-13 20:21:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:21,220 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-07-13 20:21:21,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-07-13 20:21:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:21,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:21,225 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:21,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:21,426 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-07-13 20:21:21,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:21,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868695545] [2021-07-13 20:21:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:21,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:21,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868695545] [2021-07-13 20:21:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868695545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929133053] [2021-07-13 20:21:21,737 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 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 [2021-07-13 20:21:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:21,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:22,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:22,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:22,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:22,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929133053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:22,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:22,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:21:22,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689303564] [2021-07-13 20:21:22,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:22,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:22,101 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:23,847 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-07-13 20:21:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:21:23,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:23,855 INFO L225 Difference]: With dead ends: 5809 [2021-07-13 20:21:23,855 INFO L226 Difference]: Without dead ends: 5760 [2021-07-13 20:21:23,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1571.6ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:21:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-07-13 20:21:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-07-13 20:21:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-07-13 20:21:23,914 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-07-13 20:21:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:23,914 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-07-13 20:21:23,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-07-13 20:21:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:23,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:23,918 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:24,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:24,119 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-07-13 20:21:24,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:24,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841514848] [2021-07-13 20:21:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841514848] [2021-07-13 20:21:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841514848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912749165] [2021-07-13 20:21:24,485 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 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 [2021-07-13 20:21:24,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:24,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:24,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:24,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:24,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:24,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:24,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:24,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912749165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:24,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:21:24,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137501899] [2021-07-13 20:21:24,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:24,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:24,826 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:26,326 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-07-13 20:21:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:21:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:26,333 INFO L225 Difference]: With dead ends: 5600 [2021-07-13 20:21:26,334 INFO L226 Difference]: Without dead ends: 5549 [2021-07-13 20:21:26,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1466.4ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:21:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-07-13 20:21:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-07-13 20:21:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-07-13 20:21:26,423 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-07-13 20:21:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:26,423 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-07-13 20:21:26,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-07-13 20:21:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:26,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:26,429 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:26,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:26,630 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-07-13 20:21:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:26,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533487245] [2021-07-13 20:21:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:26,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533487245] [2021-07-13 20:21:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533487245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836589226] [2021-07-13 20:21:26,884 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 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 [2021-07-13 20:21:26,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:21:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:26,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:21:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:27,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:27,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:27,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-07-13 20:21:27,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-07-13 20:21:28,069 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-07-13 20:21:28,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:28,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-07-13 20:21:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:28,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836589226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:28,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:28,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-13 20:21:28,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121892945] [2021-07-13 20:21:28,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:28,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:28,181 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:30,711 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-07-13 20:21:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:21:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:30,718 INFO L225 Difference]: With dead ends: 5628 [2021-07-13 20:21:30,719 INFO L226 Difference]: Without dead ends: 5604 [2021-07-13 20:21:30,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2502.1ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:21:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-07-13 20:21:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-07-13 20:21:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-07-13 20:21:30,789 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-07-13 20:21:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:30,790 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-07-13 20:21:30,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-07-13 20:21:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:30,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:30,796 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:30,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:30,997 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-07-13 20:21:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419827228] [2021-07-13 20:21:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:31,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419827228] [2021-07-13 20:21:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419827228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453044155] [2021-07-13 20:21:31,271 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 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 [2021-07-13 20:21:31,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:31,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:31,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:31,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:31,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:31,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:31,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:31,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:31,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453044155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:31,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:31,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:21:31,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519205864] [2021-07-13 20:21:31,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:31,581 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:33,472 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-07-13 20:21:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:21:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:33,479 INFO L225 Difference]: With dead ends: 5013 [2021-07-13 20:21:33,479 INFO L226 Difference]: Without dead ends: 4984 [2021-07-13 20:21:33,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1798.1ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:21:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-07-13 20:21:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-07-13 20:21:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-07-13 20:21:33,534 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-07-13 20:21:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:33,534 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-07-13 20:21:33,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-07-13 20:21:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:33,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:33,538 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:33,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 20:21:33,738 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:33,739 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-07-13 20:21:33,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:33,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433893975] [2021-07-13 20:21:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:33,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433893975] [2021-07-13 20:21:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433893975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:33,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186407349] [2021-07-13 20:21:33,952 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 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 [2021-07-13 20:21:33,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:21:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:33,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:34,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:34,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:34,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:34,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:34,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:34,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:34,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186407349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:34,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:34,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514452154] [2021-07-13 20:21:34,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:34,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:34,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:34,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:34,269 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:35,734 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-07-13 20:21:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:21:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:35,742 INFO L225 Difference]: With dead ends: 4995 [2021-07-13 20:21:35,742 INFO L226 Difference]: Without dead ends: 4959 [2021-07-13 20:21:35,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1195.7ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:21:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-07-13 20:21:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-07-13 20:21:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-07-13 20:21:35,799 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-07-13 20:21:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:35,799 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-07-13 20:21:35,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-07-13 20:21:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:35,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:35,804 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 20:21:36,005 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-07-13 20:21:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:36,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241922290] [2021-07-13 20:21:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:36,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:36,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241922290] [2021-07-13 20:21:36,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241922290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:36,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029352165] [2021-07-13 20:21:36,279 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 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 [2021-07-13 20:21:36,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:21:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:36,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:21:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:36,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-07-13 20:21:36,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:21:36,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:36,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:36,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-07-13 20:21:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029352165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:37,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-07-13 20:21:37,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319012843] [2021-07-13 20:21:37,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:21:37,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:21:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:37,004 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:39,251 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-07-13 20:21:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:39,260 INFO L225 Difference]: With dead ends: 5869 [2021-07-13 20:21:39,260 INFO L226 Difference]: Without dead ends: 5852 [2021-07-13 20:21:39,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1888.1ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:21:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-07-13 20:21:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-07-13 20:21:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-07-13 20:21:39,341 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-07-13 20:21:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:39,341 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-07-13 20:21:39,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-07-13 20:21:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:39,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:39,347 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:39,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 20:21:39,547 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-07-13 20:21:39,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032592987] [2021-07-13 20:21:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:39,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:39,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032592987] [2021-07-13 20:21:39,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032592987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:39,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143964634] [2021-07-13 20:21:39,878 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 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 [2021-07-13 20:21:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:39,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:40,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:40,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:40,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:40,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:40,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:40,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:40,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143964634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:40,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:40,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-13 20:21:40,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944535819] [2021-07-13 20:21:40,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:40,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:40,172 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:41,363 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-07-13 20:21:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:21:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:41,371 INFO L225 Difference]: With dead ends: 5656 [2021-07-13 20:21:41,371 INFO L226 Difference]: Without dead ends: 5619 [2021-07-13 20:21:41,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1315.1ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:21:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-07-13 20:21:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-07-13 20:21:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-07-13 20:21:41,444 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-07-13 20:21:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:41,444 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-07-13 20:21:41,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-07-13 20:21:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:41,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:41,449 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:41,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 20:21:41,650 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-07-13 20:21:41,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:41,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505583879] [2021-07-13 20:21:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:41,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505583879] [2021-07-13 20:21:41,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505583879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30629316] [2021-07-13 20:21:41,920 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 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 [2021-07-13 20:21:41,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:41,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:41,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:42,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:42,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:42,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:42,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30629316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:42,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:42,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:42,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857952044] [2021-07-13 20:21:42,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:42,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:42,199 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:43,711 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-07-13 20:21:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:21:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:43,718 INFO L225 Difference]: With dead ends: 5225 [2021-07-13 20:21:43,718 INFO L226 Difference]: Without dead ends: 5199 [2021-07-13 20:21:43,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1456.5ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:21:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-07-13 20:21:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-07-13 20:21:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-07-13 20:21:43,786 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-07-13 20:21:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:43,786 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-07-13 20:21:43,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-07-13 20:21:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:43,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:43,790 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:43,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-13 20:21:43,991 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-07-13 20:21:43,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:43,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782907683] [2021-07-13 20:21:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:44,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:44,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782907683] [2021-07-13 20:21:44,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782907683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:44,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760112902] [2021-07-13 20:21:44,275 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 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 [2021-07-13 20:21:44,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:21:44,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:44,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:21:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:44,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:44,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:44,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:44,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-07-13 20:21:44,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-07-13 20:21:44,939 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-07-13 20:21:44,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:44,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-07-13 20:21:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:45,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760112902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:45,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:45,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-13 20:21:45,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671778195] [2021-07-13 20:21:45,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:45,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:45,037 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:47,122 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-07-13 20:21:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:21:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:47,129 INFO L225 Difference]: With dead ends: 5151 [2021-07-13 20:21:47,130 INFO L226 Difference]: Without dead ends: 5117 [2021-07-13 20:21:47,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2077.8ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:21:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-13 20:21:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-07-13 20:21:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-07-13 20:21:47,187 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-07-13 20:21:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:47,187 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-07-13 20:21:47,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-07-13 20:21:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:47,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:47,192 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:47,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:47,393 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-07-13 20:21:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:47,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100845448] [2021-07-13 20:21:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:47,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100845448] [2021-07-13 20:21:47,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100845448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608104922] [2021-07-13 20:21:47,589 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 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 [2021-07-13 20:21:47,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:47,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:47,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:47,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:47,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:47,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:47,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608104922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:47,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:47,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043914996] [2021-07-13 20:21:47,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:47,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:47,929 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:49,057 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-07-13 20:21:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:21:49,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:49,064 INFO L225 Difference]: With dead ends: 5215 [2021-07-13 20:21:49,065 INFO L226 Difference]: Without dead ends: 5184 [2021-07-13 20:21:49,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:21:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-07-13 20:21:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-07-13 20:21:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-07-13 20:21:49,130 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-07-13 20:21:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:49,131 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-07-13 20:21:49,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-07-13 20:21:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:49,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:49,136 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:49,336 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-07-13 20:21:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812167795] [2021-07-13 20:21:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:49,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812167795] [2021-07-13 20:21:49,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812167795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304001400] [2021-07-13 20:21:49,636 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 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 [2021-07-13 20:21:49,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:21:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:49,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:49,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:49,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:49,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:49,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:49,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:49,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:49,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304001400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:49,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:49,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:21:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134652303] [2021-07-13 20:21:49,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:49,939 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:51,739 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-07-13 20:21:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:21:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:51,745 INFO L225 Difference]: With dead ends: 5370 [2021-07-13 20:21:51,745 INFO L226 Difference]: Without dead ends: 5304 [2021-07-13 20:21:51,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1714.7ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:21:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-07-13 20:21:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-07-13 20:21:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-07-13 20:21:51,800 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-07-13 20:21:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:51,801 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-07-13 20:21:51,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-07-13 20:21:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:51,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:51,805 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:52,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 20:21:52,006 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-07-13 20:21:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:52,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413790089] [2021-07-13 20:21:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:52,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413790089] [2021-07-13 20:21:52,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413790089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:52,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752129703] [2021-07-13 20:21:52,245 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 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 [2021-07-13 20:21:52,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:21:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:52,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:21:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:52,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:52,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-07-13 20:21:52,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:21:52,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:52,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:52,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-07-13 20:21:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:52,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752129703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:52,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:52,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-13 20:21:52,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604140123] [2021-07-13 20:21:52,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:52,941 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:54,780 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-07-13 20:21:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:21:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:54,787 INFO L225 Difference]: With dead ends: 5271 [2021-07-13 20:21:54,787 INFO L226 Difference]: Without dead ends: 5223 [2021-07-13 20:21:54,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1776.5ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:21:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-07-13 20:21:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-07-13 20:21:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-07-13 20:21:54,853 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-07-13 20:21:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:54,853 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-07-13 20:21:54,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-07-13 20:21:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:21:54,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:54,859 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:55,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-13 20:21:55,059 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-07-13 20:21:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880799495] [2021-07-13 20:21:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:55,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880799495] [2021-07-13 20:21:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880799495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329973625] [2021-07-13 20:21:55,340 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 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 [2021-07-13 20:21:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:55,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:21:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:55,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:55,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:55,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-13 20:21:55,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:55,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:55,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:55,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-13 20:21:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:55,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329973625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:55,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:55,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:21:55,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292744605] [2021-07-13 20:21:55,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:55,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:55,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:55,657 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:57,489 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-07-13 20:21:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:21:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:21:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:57,497 INFO L225 Difference]: With dead ends: 5304 [2021-07-13 20:21:57,497 INFO L226 Difference]: Without dead ends: 5284 [2021-07-13 20:21:57,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1725.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:21:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-07-13 20:21:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-07-13 20:21:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-07-13 20:21:57,582 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-07-13 20:21:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:57,582 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-07-13 20:21:57,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-07-13 20:21:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:21:57,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:57,588 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:57,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:57,788 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-07-13 20:21:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:57,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691386995] [2021-07-13 20:21:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691386995] [2021-07-13 20:21:57,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691386995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467251372] [2021-07-13 20:21:57,887 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 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 [2021-07-13 20:21:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:21:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:58,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467251372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:58,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:58,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191477466] [2021-07-13 20:21:58,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:58,120 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:21:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:59,225 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-07-13 20:21:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:21:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) Word has length 32 [2021-07-13 20:21:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:59,234 INFO L225 Difference]: With dead ends: 6004 [2021-07-13 20:21:59,234 INFO L226 Difference]: Without dead ends: 6004 [2021-07-13 20:21:59,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1011.5ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:21:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-07-13 20:21:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-07-13 20:21:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-07-13 20:21:59,302 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-07-13 20:21:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:59,302 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-07-13 20:21:59,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:21:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-07-13 20:21:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:21:59,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:59,308 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:59,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-13 20:21:59,508 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-07-13 20:21:59,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:59,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015836190] [2021-07-13 20:21:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:59,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015836190] [2021-07-13 20:21:59,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015836190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612785179] [2021-07-13 20:21:59,616 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 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 [2021-07-13 20:21:59,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:21:59,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:59,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:21:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612785179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:59,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:59,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068092903] [2021-07-13 20:21:59,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:59,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:59,846 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:01,463 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-07-13 20:22:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:22:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:22:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:01,476 INFO L225 Difference]: With dead ends: 7971 [2021-07-13 20:22:01,476 INFO L226 Difference]: Without dead ends: 7867 [2021-07-13 20:22:01,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1495.1ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:22:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-07-13 20:22:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-07-13 20:22:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-07-13 20:22:01,571 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-07-13 20:22:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:01,572 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-07-13 20:22:01,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-07-13 20:22:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:01,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:01,577 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:01,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:01,778 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-07-13 20:22:01,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:01,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416664121] [2021-07-13 20:22:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:01,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416664121] [2021-07-13 20:22:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416664121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319018868] [2021-07-13 20:22:01,842 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 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 [2021-07-13 20:22:01,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:02,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319018868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 20:22:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931717198] [2021-07-13 20:22:02,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:22:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:22:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:02,089 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:03,452 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-07-13 20:22:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:22:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) Word has length 32 [2021-07-13 20:22:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:03,467 INFO L225 Difference]: With dead ends: 9415 [2021-07-13 20:22:03,467 INFO L226 Difference]: Without dead ends: 9411 [2021-07-13 20:22:03,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1189.3ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:22:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-07-13 20:22:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-07-13 20:22:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-07-13 20:22:03,600 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-07-13 20:22:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:03,600 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-07-13 20:22:03,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-07-13 20:22:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:03,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:03,607 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:03,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:03,810 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-07-13 20:22:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:03,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666252476] [2021-07-13 20:22:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:03,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666252476] [2021-07-13 20:22:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666252476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858046300] [2021-07-13 20:22:03,866 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 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 [2021-07-13 20:22:03,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:22:03,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:04,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858046300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:04,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:04,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 20:22:04,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005457567] [2021-07-13 20:22:04,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:22:04,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:22:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:04,092 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:05,122 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-07-13 20:22:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:22:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) Word has length 32 [2021-07-13 20:22:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:05,131 INFO L225 Difference]: With dead ends: 7287 [2021-07-13 20:22:05,131 INFO L226 Difference]: Without dead ends: 7283 [2021-07-13 20:22:05,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:22:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-07-13 20:22:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-07-13 20:22:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-07-13 20:22:05,207 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-07-13 20:22:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:05,207 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-07-13 20:22:05,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-07-13 20:22:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:05,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:05,213 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:05,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-07-13 20:22:05,413 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-07-13 20:22:05,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:05,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503145538] [2021-07-13 20:22:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:05,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:05,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503145538] [2021-07-13 20:22:05,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503145538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:05,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909171474] [2021-07-13 20:22:05,470 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 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 [2021-07-13 20:22:05,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:22:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909171474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 20:22:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611798299] [2021-07-13 20:22:05,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:22:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:22:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:05,672 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:06,455 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-07-13 20:22:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:22:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:22:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:06,469 INFO L225 Difference]: With dead ends: 8864 [2021-07-13 20:22:06,469 INFO L226 Difference]: Without dead ends: 8852 [2021-07-13 20:22:06,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:22:06,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-07-13 20:22:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-07-13 20:22:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-07-13 20:22:06,613 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-07-13 20:22:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:06,613 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-07-13 20:22:06,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-07-13 20:22:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:06,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:06,620 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:06,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:06,820 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-07-13 20:22:06,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:06,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197710051] [2021-07-13 20:22:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:06,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197710051] [2021-07-13 20:22:06,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197710051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785953281] [2021-07-13 20:22:06,877 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 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 [2021-07-13 20:22:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785953281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:07,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:07,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-13 20:22:07,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19906539] [2021-07-13 20:22:07,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:07,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:07,136 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:08,239 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-07-13 20:22:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:22:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) Word has length 32 [2021-07-13 20:22:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:08,252 INFO L225 Difference]: With dead ends: 8195 [2021-07-13 20:22:08,252 INFO L226 Difference]: Without dead ends: 8183 [2021-07-13 20:22:08,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:22:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-07-13 20:22:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-07-13 20:22:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-07-13 20:22:08,377 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-07-13 20:22:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:08,377 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-07-13 20:22:08,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-07-13 20:22:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:08,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:08,384 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:08,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:08,584 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-07-13 20:22:08,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:08,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151357508] [2021-07-13 20:22:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151357508] [2021-07-13 20:22:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151357508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175652548] [2021-07-13 20:22:08,651 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 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 [2021-07-13 20:22:08,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175652548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:08,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-13 20:22:08,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571615329] [2021-07-13 20:22:08,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:08,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:08,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:08,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:08,860 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:09,903 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-07-13 20:22:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:22:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) Word has length 32 [2021-07-13 20:22:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:09,917 INFO L225 Difference]: With dead ends: 8748 [2021-07-13 20:22:09,918 INFO L226 Difference]: Without dead ends: 8722 [2021-07-13 20:22:09,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 923.4ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:22:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-07-13 20:22:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-07-13 20:22:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-07-13 20:22:10,062 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-07-13 20:22:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:10,062 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-07-13 20:22:10,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-07-13 20:22:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:10,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:10,069 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:10,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-13 20:22:10,270 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-07-13 20:22:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:10,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307357705] [2021-07-13 20:22:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:10,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307357705] [2021-07-13 20:22:10,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307357705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108550047] [2021-07-13 20:22:10,355 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 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 [2021-07-13 20:22:10,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:22:10,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108550047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:10,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:22:10,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447686555] [2021-07-13 20:22:10,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:22:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:22:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:10,583 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:11,629 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-07-13 20:22:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:22:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) Word has length 32 [2021-07-13 20:22:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:11,673 INFO L225 Difference]: With dead ends: 9131 [2021-07-13 20:22:11,673 INFO L226 Difference]: Without dead ends: 9101 [2021-07-13 20:22:11,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:22:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-07-13 20:22:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-07-13 20:22:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-07-13 20:22:11,784 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-07-13 20:22:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:11,784 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-07-13 20:22:11,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-07-13 20:22:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:11,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:11,790 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:11,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-13 20:22:11,991 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-07-13 20:22:11,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:11,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549491005] [2021-07-13 20:22:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:12,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549491005] [2021-07-13 20:22:12,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549491005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347110600] [2021-07-13 20:22:12,083 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 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 [2021-07-13 20:22:12,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347110600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:12,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:22:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189611147] [2021-07-13 20:22:12,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:22:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:22:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:22:12,303 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-07-13 20:22:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:13,534 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-07-13 20:22:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:22:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) Word has length 32 [2021-07-13 20:22:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:13,547 INFO L225 Difference]: With dead ends: 8276 [2021-07-13 20:22:13,547 INFO L226 Difference]: Without dead ends: 8276 [2021-07-13 20:22:13,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1015.5ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:22:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-07-13 20:22:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-07-13 20:22:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-07-13 20:22:13,665 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-07-13 20:22:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:13,665 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-07-13 20:22:13,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-07-13 20:22:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-07-13 20:22:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:13,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:13,671 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:13,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 20:22:13,872 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-07-13 20:22:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:13,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711787147] [2021-07-13 20:22:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:13,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711787147] [2021-07-13 20:22:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711787147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615829545] [2021-07-13 20:22:13,960 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 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 [2021-07-13 20:22:13,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:22:13,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615829545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:14,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:22:14,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946096782] [2021-07-13 20:22:14,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:22:14,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:22:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:14,177 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:15,322 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-07-13 20:22:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:22:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) Word has length 32 [2021-07-13 20:22:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:15,332 INFO L225 Difference]: With dead ends: 7180 [2021-07-13 20:22:15,332 INFO L226 Difference]: Without dead ends: 7114 [2021-07-13 20:22:15,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 1025.8ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:22:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-07-13 20:22:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-07-13 20:22:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-07-13 20:22:15,436 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-07-13 20:22:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:15,436 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-07-13 20:22:15,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-07-13 20:22:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:15,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:15,441 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:15,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:15,642 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-07-13 20:22:15,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:15,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820207285] [2021-07-13 20:22:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820207285] [2021-07-13 20:22:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820207285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129871249] [2021-07-13 20:22:15,724 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 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 [2021-07-13 20:22:15,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:22:15,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:15,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:15,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:15,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129871249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:15,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:15,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:22:15,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110485224] [2021-07-13 20:22:15,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:22:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:22:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:15,937 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-07-13 20:22:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:17,175 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-07-13 20:22:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:22:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) Word has length 32 [2021-07-13 20:22:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:17,188 INFO L225 Difference]: With dead ends: 8027 [2021-07-13 20:22:17,188 INFO L226 Difference]: Without dead ends: 8027 [2021-07-13 20:22:17,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:22:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-07-13 20:22:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-07-13 20:22:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-07-13 20:22:17,271 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-07-13 20:22:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:17,271 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-07-13 20:22:17,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-07-13 20:22:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-07-13 20:22:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:17,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:17,276 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:17,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 20:22:17,477 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-07-13 20:22:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:17,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232076261] [2021-07-13 20:22:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:17,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232076261] [2021-07-13 20:22:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232076261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653200594] [2021-07-13 20:22:17,581 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 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 [2021-07-13 20:22:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653200594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:17,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:17,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-13 20:22:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092707723] [2021-07-13 20:22:17,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:17,788 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:18,805 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-07-13 20:22:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:22:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) Word has length 32 [2021-07-13 20:22:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:18,814 INFO L225 Difference]: With dead ends: 6472 [2021-07-13 20:22:18,814 INFO L226 Difference]: Without dead ends: 6433 [2021-07-13 20:22:18,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 917.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:22:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-07-13 20:22:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-07-13 20:22:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-07-13 20:22:18,888 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-07-13 20:22:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:18,888 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-07-13 20:22:18,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-07-13 20:22:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:18,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:18,893 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:19,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-07-13 20:22:19,093 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-07-13 20:22:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:19,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400472496] [2021-07-13 20:22:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:19,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:19,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400472496] [2021-07-13 20:22:19,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400472496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161813590] [2021-07-13 20:22:19,161 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 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 [2021-07-13 20:22:19,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161813590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:19,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-13 20:22:19,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115156055] [2021-07-13 20:22:19,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:19,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:19,367 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-07-13 20:22:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:20,703 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-07-13 20:22:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:22:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) Word has length 32 [2021-07-13 20:22:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:20,714 INFO L225 Difference]: With dead ends: 8061 [2021-07-13 20:22:20,714 INFO L226 Difference]: Without dead ends: 8061 [2021-07-13 20:22:20,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1163.1ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:22:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-07-13 20:22:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-07-13 20:22:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-07-13 20:22:20,815 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-07-13 20:22:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:20,815 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-07-13 20:22:20,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-07-13 20:22:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-07-13 20:22:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:20,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:20,821 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:21,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:21,022 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-07-13 20:22:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:21,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967955492] [2021-07-13 20:22:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:21,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967955492] [2021-07-13 20:22:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967955492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281687516] [2021-07-13 20:22:21,081 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 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 [2021-07-13 20:22:21,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:22:21,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:21,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281687516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:21,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-13 20:22:21,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082626618] [2021-07-13 20:22:21,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:21,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:21,288 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:22,226 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-07-13 20:22:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:22:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) Word has length 32 [2021-07-13 20:22:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:22,236 INFO L225 Difference]: With dead ends: 6889 [2021-07-13 20:22:22,236 INFO L226 Difference]: Without dead ends: 6871 [2021-07-13 20:22:22,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:22:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-07-13 20:22:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-07-13 20:22:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-07-13 20:22:22,325 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-07-13 20:22:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:22,325 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-07-13 20:22:22,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-07-13 20:22:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:22,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:22,331 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:22,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:22,531 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-07-13 20:22:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:22,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064984153] [2021-07-13 20:22:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:22,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064984153] [2021-07-13 20:22:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064984153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487956664] [2021-07-13 20:22:22,596 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 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 [2021-07-13 20:22:22,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:22,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487956664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:22,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:22,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-13 20:22:22,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166754457] [2021-07-13 20:22:22,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:22,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:22,802 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:24,195 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-07-13 20:22:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:22:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:22:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:24,221 INFO L225 Difference]: With dead ends: 10330 [2021-07-13 20:22:24,221 INFO L226 Difference]: Without dead ends: 10330 [2021-07-13 20:22:24,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:22:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-07-13 20:22:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-07-13 20:22:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-07-13 20:22:24,403 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-07-13 20:22:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:24,403 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-07-13 20:22:24,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-07-13 20:22:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:24,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:24,412 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:24,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:24,612 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-07-13 20:22:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449449469] [2021-07-13 20:22:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:24,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449449469] [2021-07-13 20:22:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449449469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864807293] [2021-07-13 20:22:24,664 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 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 [2021-07-13 20:22:24,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:22:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:24,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864807293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:24,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:24,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 20:22:24,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59547324] [2021-07-13 20:22:24,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:22:24,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:22:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:24,865 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:25,751 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-07-13 20:22:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:22:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) Word has length 32 [2021-07-13 20:22:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:25,805 INFO L225 Difference]: With dead ends: 10140 [2021-07-13 20:22:25,805 INFO L226 Difference]: Without dead ends: 10136 [2021-07-13 20:22:25,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:22:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-07-13 20:22:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-07-13 20:22:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-07-13 20:22:25,949 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-07-13 20:22:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:25,949 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-07-13 20:22:25,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-07-13 20:22:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-07-13 20:22:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:25,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:25,958 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:26,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:26,158 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:26,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-07-13 20:22:26,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:26,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507981466] [2021-07-13 20:22:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:26,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507981466] [2021-07-13 20:22:26,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507981466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808319911] [2021-07-13 20:22:26,216 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 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 [2021-07-13 20:22:26,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:22:26,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:26,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:26,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808319911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:26,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:26,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-13 20:22:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976013053] [2021-07-13 20:22:26,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:26,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:26,422 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:27,314 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-07-13 20:22:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:22:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) Word has length 32 [2021-07-13 20:22:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:27,329 INFO L225 Difference]: With dead ends: 10548 [2021-07-13 20:22:27,329 INFO L226 Difference]: Without dead ends: 10536 [2021-07-13 20:22:27,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:22:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-07-13 20:22:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-07-13 20:22:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-07-13 20:22:27,500 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-07-13 20:22:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:27,500 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-07-13 20:22:27,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-07-13 20:22:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-07-13 20:22:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:27,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:27,509 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:27,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-13 20:22:27,711 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-07-13 20:22:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913215478] [2021-07-13 20:22:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:27,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913215478] [2021-07-13 20:22:27,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913215478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66848892] [2021-07-13 20:22:27,774 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 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 [2021-07-13 20:22:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66848892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:27,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-13 20:22:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021565899] [2021-07-13 20:22:27,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:27,986 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:28,891 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-07-13 20:22:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:22:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) Word has length 32 [2021-07-13 20:22:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:28,910 INFO L225 Difference]: With dead ends: 11364 [2021-07-13 20:22:28,911 INFO L226 Difference]: Without dead ends: 11344 [2021-07-13 20:22:28,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 814.8ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:22:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-07-13 20:22:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-07-13 20:22:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-07-13 20:22:29,184 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-07-13 20:22:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:29,184 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-07-13 20:22:29,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-07-13 20:22:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-07-13 20:22:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:29,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:29,193 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:29,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-07-13 20:22:29,394 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-07-13 20:22:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:29,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266456972] [2021-07-13 20:22:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:29,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266456972] [2021-07-13 20:22:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266456972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231249896] [2021-07-13 20:22:29,465 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 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 [2021-07-13 20:22:29,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:29,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:29,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:29,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231249896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:29,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:22:29,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421153659] [2021-07-13 20:22:29,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:22:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:22:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:29,692 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:30,674 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-07-13 20:22:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:22:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) Word has length 32 [2021-07-13 20:22:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:30,695 INFO L225 Difference]: With dead ends: 12734 [2021-07-13 20:22:30,695 INFO L226 Difference]: Without dead ends: 12706 [2021-07-13 20:22:30,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:22:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-07-13 20:22:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-07-13 20:22:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-07-13 20:22:30,950 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-07-13 20:22:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:30,950 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-07-13 20:22:30,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-07-13 20:22:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-07-13 20:22:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:22:30,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:30,959 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:31,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 20:22:31,161 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-07-13 20:22:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:31,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531531302] [2021-07-13 20:22:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:31,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:31,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531531302] [2021-07-13 20:22:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531531302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99313110] [2021-07-13 20:22:31,241 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 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 [2021-07-13 20:22:31,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:22:31,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:31,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99313110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:31,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:22:31,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775418560] [2021-07-13 20:22:31,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:22:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:22:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:22:31,463 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:22:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:32,608 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-07-13 20:22:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:22:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) Word has length 32 [2021-07-13 20:22:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:32,627 INFO L225 Difference]: With dead ends: 12970 [2021-07-13 20:22:32,627 INFO L226 Difference]: Without dead ends: 12934 [2021-07-13 20:22:32,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1056.0ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:22:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-07-13 20:22:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-07-13 20:22:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-07-13 20:22:32,844 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-07-13 20:22:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:32,844 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-07-13 20:22:32,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:22:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-07-13 20:22:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:32,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:32,855 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:33,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-13 20:22:33,055 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-07-13 20:22:33,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:33,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700342850] [2021-07-13 20:22:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:33,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700342850] [2021-07-13 20:22:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700342850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136692623] [2021-07-13 20:22:33,395 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 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 [2021-07-13 20:22:33,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:33,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:33,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:22:33,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:33,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:33,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:22:33,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:33,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:33,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:33,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:22:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136692623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:33,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-13 20:22:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603869694] [2021-07-13 20:22:33,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:33,867 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:36,625 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-07-13 20:22:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:22:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:22:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:36,652 INFO L225 Difference]: With dead ends: 14875 [2021-07-13 20:22:36,652 INFO L226 Difference]: Without dead ends: 14868 [2021-07-13 20:22:36,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2439.5ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:22:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-07-13 20:22:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-07-13 20:22:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-07-13 20:22:36,861 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-07-13 20:22:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:36,861 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-07-13 20:22:36,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-07-13 20:22:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:36,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:36,874 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:37,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-13 20:22:37,074 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-07-13 20:22:37,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:37,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166144452] [2021-07-13 20:22:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:37,945 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:22:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:37,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:37,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166144452] [2021-07-13 20:22:37,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166144452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:37,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143216737] [2021-07-13 20:22:37,946 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 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 [2021-07-13 20:22:38,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:22:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:38,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:22:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:38,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:22:38,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:38,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:38,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:38,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:22:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143216737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:38,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:38,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-13 20:22:38,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372784315] [2021-07-13 20:22:38,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:38,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:38,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:38,785 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:40,980 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-07-13 20:22:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:22:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:22:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:41,004 INFO L225 Difference]: With dead ends: 14838 [2021-07-13 20:22:41,004 INFO L226 Difference]: Without dead ends: 14775 [2021-07-13 20:22:41,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2681.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:22:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-07-13 20:22:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-07-13 20:22:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-07-13 20:22:41,235 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-07-13 20:22:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:41,235 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-07-13 20:22:41,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-07-13 20:22:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:41,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:41,246 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:41,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:41,447 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-07-13 20:22:41,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:41,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935250196] [2021-07-13 20:22:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:41,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935250196] [2021-07-13 20:22:41,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935250196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820377554] [2021-07-13 20:22:41,919 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 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 [2021-07-13 20:22:41,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:22:41,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:41,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:22:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:42,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-07-13 20:22:42,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:22:42,781 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-07-13 20:22:42,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:22:42,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-07-13 20:22:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:42,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820377554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:42,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:42,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-07-13 20:22:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111291671] [2021-07-13 20:22:42,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:22:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:22:42,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:22:42,845 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:45,198 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-07-13 20:22:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:22:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:22:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:45,225 INFO L225 Difference]: With dead ends: 15015 [2021-07-13 20:22:45,225 INFO L226 Difference]: Without dead ends: 14957 [2021-07-13 20:22:45,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2418.7ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-07-13 20:22:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-07-13 20:22:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-07-13 20:22:45,416 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-07-13 20:22:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:45,416 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-07-13 20:22:45,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-07-13 20:22:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:45,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:45,427 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:45,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 20:22:45,629 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-07-13 20:22:45,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:45,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644002092] [2021-07-13 20:22:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:46,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644002092] [2021-07-13 20:22:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644002092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142095460] [2021-07-13 20:22:46,339 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 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 [2021-07-13 20:22:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:46,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:22:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:46,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:46,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:46,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:46,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:22:46,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:46,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:46,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:46,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:22:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142095460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:46,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-13 20:22:46,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103987173] [2021-07-13 20:22:46,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:46,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:46,831 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:49,124 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-07-13 20:22:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:22:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:22:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:49,152 INFO L225 Difference]: With dead ends: 15455 [2021-07-13 20:22:49,152 INFO L226 Difference]: Without dead ends: 15407 [2021-07-13 20:22:49,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2408.2ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:22:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-07-13 20:22:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-07-13 20:22:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-07-13 20:22:49,418 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-07-13 20:22:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:49,418 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-07-13 20:22:49,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-07-13 20:22:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:49,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:49,430 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:49,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:49,630 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-07-13 20:22:49,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:49,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394599527] [2021-07-13 20:22:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:49,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394599527] [2021-07-13 20:22:49,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394599527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282591108] [2021-07-13 20:22:49,992 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 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 [2021-07-13 20:22:50,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:50,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:22:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:50,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:50,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:22:50,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:50,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:50,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:50,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:22:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:50,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282591108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:50,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:50,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-13 20:22:50,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246739251] [2021-07-13 20:22:50,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:50,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:50,425 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:53,161 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-07-13 20:22:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:22:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:22:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:53,188 INFO L225 Difference]: With dead ends: 16292 [2021-07-13 20:22:53,188 INFO L226 Difference]: Without dead ends: 16283 [2021-07-13 20:22:53,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2537.5ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:22:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-07-13 20:22:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-07-13 20:22:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-07-13 20:22:53,415 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-07-13 20:22:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:53,415 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-07-13 20:22:53,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-07-13 20:22:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:22:53,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:53,429 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:53,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:53,629 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-07-13 20:22:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:53,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823064578] [2021-07-13 20:22:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:22:53,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:53,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823064578] [2021-07-13 20:22:53,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823064578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:53,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490434247] [2021-07-13 20:22:53,894 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 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 [2021-07-13 20:22:53,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:22:53,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:53,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:22:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:55,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:55,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:55,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-07-13 20:22:56,023 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-07-13 20:22:56,141 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-07-13 20:22:56,422 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-07-13 20:22:56,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-13 20:22:56,896 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 24 [2021-07-13 20:22:56,896 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-07-13 20:22:56,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:22:56,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-07-13 20:22:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:56,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490434247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:56,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:56,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-07-13 20:22:56,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103683017] [2021-07-13 20:22:56,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:56,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:56,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:56,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:56,953 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:03,620 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-07-13 20:23:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:23:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:03,652 INFO L225 Difference]: With dead ends: 16489 [2021-07-13 20:23:03,653 INFO L226 Difference]: Without dead ends: 16467 [2021-07-13 20:23:03,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 5237.7ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:23:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-07-13 20:23:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-07-13 20:23:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-07-13 20:23:03,890 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-07-13 20:23:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:03,890 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-07-13 20:23:03,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-07-13 20:23:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:03,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:03,902 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:04,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-07-13 20:23:04,103 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-07-13 20:23:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750930203] [2021-07-13 20:23:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:23:04,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750930203] [2021-07-13 20:23:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750930203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925930644] [2021-07-13 20:23:04,417 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 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 [2021-07-13 20:23:04,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:04,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:04,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:04,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:04,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:04,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:04,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:04,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:04,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:04,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925930644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:23:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170400464] [2021-07-13 20:23:04,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:23:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:23:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:23:04,884 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:07,236 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-07-13 20:23:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:23:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:07,261 INFO L225 Difference]: With dead ends: 16411 [2021-07-13 20:23:07,261 INFO L226 Difference]: Without dead ends: 16378 [2021-07-13 20:23:07,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2118.5ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:23:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-07-13 20:23:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-07-13 20:23:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-07-13 20:23:07,473 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-07-13 20:23:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:07,473 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-07-13 20:23:07,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-07-13 20:23:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:07,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:07,485 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:07,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:07,685 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-07-13 20:23:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:07,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556837680] [2021-07-13 20:23:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:23:07,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556837680] [2021-07-13 20:23:07,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556837680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:07,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136645901] [2021-07-13 20:23:07,929 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 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 [2021-07-13 20:23:07,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:23:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:07,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:08,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:08,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:08,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:08,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:08,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:08,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136645901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:08,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:08,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:23:08,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649093868] [2021-07-13 20:23:08,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:23:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:08,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:23:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:23:08,336 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:11,378 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-07-13 20:23:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:23:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:11,413 INFO L225 Difference]: With dead ends: 16814 [2021-07-13 20:23:11,413 INFO L226 Difference]: Without dead ends: 16795 [2021-07-13 20:23:11,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2649.8ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:23:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-07-13 20:23:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-07-13 20:23:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-07-13 20:23:11,655 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-07-13 20:23:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:11,656 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-07-13 20:23:11,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-07-13 20:23:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:11,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:11,668 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:11,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:11,869 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-07-13 20:23:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:11,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976045563] [2021-07-13 20:23:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:23:12,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976045563] [2021-07-13 20:23:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976045563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885640452] [2021-07-13 20:23:12,157 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 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 [2021-07-13 20:23:12,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:23:12,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:12,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:23:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:12,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:12,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-07-13 20:23:12,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:23:13,041 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-07-13 20:23:13,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:23:13,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-07-13 20:23:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:13,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885640452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:13,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:13,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-07-13 20:23:13,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561078907] [2021-07-13 20:23:13,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:23:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:23:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:23:13,105 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:15,757 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-07-13 20:23:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:23:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:15,785 INFO L225 Difference]: With dead ends: 15950 [2021-07-13 20:23:15,785 INFO L226 Difference]: Without dead ends: 15904 [2021-07-13 20:23:15,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2401.7ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:23:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-07-13 20:23:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-07-13 20:23:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-07-13 20:23:16,053 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-07-13 20:23:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:16,053 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-07-13 20:23:16,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-07-13 20:23:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:16,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:16,065 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:16,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-07-13 20:23:16,266 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-07-13 20:23:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:16,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426583750] [2021-07-13 20:23:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:23:16,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:16,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426583750] [2021-07-13 20:23:16,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426583750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:16,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166821495] [2021-07-13 20:23:16,512 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 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 [2021-07-13 20:23:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:16,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:16,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:16,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:16,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:16,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:16,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:16,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:16,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166821495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:16,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:16,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:23:16,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912508195] [2021-07-13 20:23:16,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:16,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:16,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:16,991 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:19,362 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-07-13 20:23:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:23:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:19,387 INFO L225 Difference]: With dead ends: 13633 [2021-07-13 20:23:19,387 INFO L226 Difference]: Without dead ends: 13606 [2021-07-13 20:23:19,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 2101.7ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:23:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-07-13 20:23:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-07-13 20:23:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-07-13 20:23:19,676 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-07-13 20:23:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:19,676 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-07-13 20:23:19,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-07-13 20:23:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:19,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:19,688 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:19,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:19,888 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-07-13 20:23:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:19,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449646486] [2021-07-13 20:23:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:23:20,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:20,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449646486] [2021-07-13 20:23:20,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449646486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:20,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664494657] [2021-07-13 20:23:20,161 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 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 [2021-07-13 20:23:20,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:20,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:20,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:20,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:20,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:20,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:20,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:20,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:20,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:20,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664494657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:20,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:20,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:23:20,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228170482] [2021-07-13 20:23:20,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:23:20,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:23:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:23:20,583 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:22,744 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-07-13 20:23:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:23:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:22,775 INFO L225 Difference]: With dead ends: 16746 [2021-07-13 20:23:22,775 INFO L226 Difference]: Without dead ends: 16713 [2021-07-13 20:23:22,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2037.4ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:23:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-07-13 20:23:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-07-13 20:23:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-07-13 20:23:23,072 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-07-13 20:23:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:23,072 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-07-13 20:23:23,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-07-13 20:23:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:23,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:23,085 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:23,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-07-13 20:23:23,287 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-07-13 20:23:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:23,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32414706] [2021-07-13 20:23:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:23:23,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:23,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32414706] [2021-07-13 20:23:23,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32414706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:23,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196412134] [2021-07-13 20:23:23,572 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 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 [2021-07-13 20:23:23,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:23:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:23,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:23:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:24,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-07-13 20:23:24,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:23:24,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:24,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:24,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-07-13 20:23:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196412134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:25,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:25,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-07-13 20:23:25,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441195695] [2021-07-13 20:23:25,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:23:25,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:25,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:23:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:23:25,151 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:29,989 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-07-13 20:23:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:23:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:30,020 INFO L225 Difference]: With dead ends: 16941 [2021-07-13 20:23:30,020 INFO L226 Difference]: Without dead ends: 16910 [2021-07-13 20:23:30,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 4177.6ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-07-13 20:23:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-07-13 20:23:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-07-13 20:23:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-07-13 20:23:30,277 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-07-13 20:23:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:30,277 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-07-13 20:23:30,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-07-13 20:23:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:30,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:30,291 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:30,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-07-13 20:23:30,493 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-07-13 20:23:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:30,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021675537] [2021-07-13 20:23:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:23:30,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:30,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021675537] [2021-07-13 20:23:30,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021675537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:30,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95093345] [2021-07-13 20:23:30,814 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 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 [2021-07-13 20:23:30,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:30,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:31,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:31,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:31,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:31,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:31,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:31,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:31,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:31,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95093345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:23:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458226480] [2021-07-13 20:23:31,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:23:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:23:31,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:23:31,242 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:33,765 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-07-13 20:23:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:23:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:33,792 INFO L225 Difference]: With dead ends: 13890 [2021-07-13 20:23:33,792 INFO L226 Difference]: Without dead ends: 13872 [2021-07-13 20:23:33,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2206.1ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:23:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-07-13 20:23:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-07-13 20:23:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-07-13 20:23:34,066 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-07-13 20:23:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:34,066 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-07-13 20:23:34,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-07-13 20:23:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:34,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:34,077 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:34,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-07-13 20:23:34,278 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:34,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-07-13 20:23:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553798731] [2021-07-13 20:23:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:34,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:34,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553798731] [2021-07-13 20:23:34,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553798731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:34,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473659045] [2021-07-13 20:23:34,543 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 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 [2021-07-13 20:23:34,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:23:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:34,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:23:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:34,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-13 20:23:34,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:34,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:34,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:34,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-13 20:23:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473659045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:34,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:34,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-13 20:23:34,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421410191] [2021-07-13 20:23:34,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:23:34,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:23:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:23:34,957 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:36,283 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-07-13 20:23:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:23:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:23:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:36,307 INFO L225 Difference]: With dead ends: 13122 [2021-07-13 20:23:36,307 INFO L226 Difference]: Without dead ends: 13095 [2021-07-13 20:23:36,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1177.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:23:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-07-13 20:23:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-07-13 20:23:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-07-13 20:23:36,546 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-07-13 20:23:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:36,546 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-07-13 20:23:36,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-07-13 20:23:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:23:36,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:36,559 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:36,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable942,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:36,760 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:36,760 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-07-13 20:23:36,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:36,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629513381] [2021-07-13 20:23:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:37,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629513381] [2021-07-13 20:23:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629513381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507095918] [2021-07-13 20:23:37,025 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 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 [2021-07-13 20:23:37,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:23:37,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:37,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:23:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:37,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:37,860 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-13 20:23:37,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:37,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-07-13 20:23:38,479 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 196 [2021-07-13 20:23:39,463 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-07-13 20:23:39,964 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-07-13 20:23:40,473 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-07-13 20:23:41,025 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-07-13 20:23:41,535 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-07-13 20:23:42,304 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 223 [2021-07-13 20:23:42,869 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-07-13 20:23:43,431 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-07-13 20:23:44,385 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-07-13 20:23:44,893 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 218 [2021-07-13 20:23:45,104 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-07-13 20:23:45,566 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-07-13 20:23:45,770 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-07-13 20:23:46,140 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-07-13 20:23:47,949 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-07-13 20:23:49,446 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-07-13 20:23:50,980 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-07-13 20:23:53,005 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-07-13 20:23:54,749 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-07-13 20:23:57,655 WARN L205 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 440 DAG size of output: 330 [2021-07-13 20:25:02,297 WARN L205 SmtUtils]: Spent 1.08 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1623 [2021-07-13 20:27:40,394 WARN L205 SmtUtils]: Spent 2.63 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown